169 (число) (Russian Wikipedia)

Analysis of information sources in references of the Wikipedia article "169 (число)" in Russian language version.

refsWebsite
Global rank Russian rank
742nd place
714th place
1st place
1st place
low place
4,377th place
6th place
9th place

archive.org

  • Joe Roberts. Integer 144 // Lure of the Integers (англ.). — MAA, 1992. — P. 224. — ISBN 0-88385-502-X.

oeis.org

  • Последовательность A000959 в OEIS = Lucky numbers. // 141, 151, 159, 163, 169, 171, 189, 193, 195
  • Последовательность A000290 в OEIS = The squares: a(n) = n^2. // 100, 121, 144, 169, 196, 225, 256
  • Последовательность A001358 в OEIS = Semiprimes (or biprimes): products of two primes. // 159, 161, 166, 169, 177, 178, 183
  • Последовательность A000129 в OEIS = Pell numbers: a(0) = 0, a(1) = 1; for n > 1, a(n) = 2*a(n-1) + a(n-2). // 5, 12, 29, 70, 169, 408, 985, 2378, 5741
  • Последовательность A003215 в OEIS = Hex (or centered hexagonal) numbers: 3*n*(n+1)+1 (crystal ball sequence for hexagonal lattice). // 37, 61, 91, 127, 169, 217, 271, 331, 397
  • Последовательность A002559 в OEIS = Markoff (or Markov) numbers: union of positive integers x, y, z satisfying x^2 + y^2 + z^2 = 3xyz. // 13, 29, 34, 89, 169, 194, 233, 433, 610
  • Последовательность A127334 в OEIS = Numbers that are the sum of 7 consecutive primes. // 75, 95, 119, 143, 169, 197, 223, 251, 281
  • Последовательность A014090 в OEIS = Numbers that are not the sum of a square and a prime. // 85, 91, 121, 130, 169, 196, 214, 226, 289
  • Последовательность A048968 в OEIS = Numbers n such that sigma(n) / d(n) is prime. // 49, 61, 73, 150, 157, 169, 193, 277, 313, 361, 397
  • Последовательность A048969 в OEIS = Numbers n such that n is composite and sigma(n) / d(n) is prime. // 6, 20, 45, 49, 150, 169, 361, 832, 961, 1445, 1734
  • Последовательность A188284 в OEIS = Finite sequence of numbers n such that iterations for the map r -> A061602(r) starting with n ends with the same number n. // 1, 2, 145, 169, 871, 872, 1454, 40 585, 45 361, 45 362, 363 601
  • Последовательность A033491 в OEIS = a(n) is the smallest integer that takes n halving and tripling steps to reach 1 in the 3x+1 problem. // 361, 123, 246, 481, 169, 329, 641, 219, 427
  • Последовательность A259544 в OEIS = Minimum greatest integer in a set of n positive integers whose subsets all have distinct arithmetic means. // 1, 2, 4, 7, 16, 32, 75, 169

stetson.edu

www2.stetson.edu

web.archive.org