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 A272140 Numbers n such that Bernoulli number B_{n} has denominator 1590. 27
 52, 104, 988, 1976, 3068, 3172, 5252, 5356, 5564, 6136, 6344, 7124, 7748, 8164, 8684, 10244, 10712, 12532, 13364, 13676, 13988, 14092, 16276, 16328, 17212, 17368, 17524, 18044, 18356, 19084, 19916, 20228, 20488, 20644, 22828, 23348, 23764 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS 1590 = 2 * 3 * 5 * 53. All terms are multiple of a(1) = 52. For these numbers numerator(B_{n}) mod denominator(B_{n}) = 1507. LINKS Seiichi Manyama, Table of n, a(n) for n = 1..1000 EXAMPLE Bernoulli B_{52} is -801165718135489957347924991853/1590, hence 52 is in the sequence. MAPLE with(numtheory): P:=proc(q, h) local n; for n from 2 by 2 to q do if denom(bernoulli(n))=h then print(n); fi; od; end: P(10^6, 1590); MATHEMATICA Select[Range[0, 1000], Denominator[BernoulliB[#]] == 1590 &] (* Robert Price, Apr 21 2016 *) PROG (PARI) isok(n) = denominator(bernfrac(n)) == 1590; \\ Michel Marcus, Apr 22 2016 CROSSREFS Cf. A045979, A051222, A051225, A051226, A051227, A051228, A051229, A051230, A119456, A119480, A249134, A255684, A271634, A271635, A272138, A272139, A272183, A272184, A272185, A272186. Sequence in context: A044141 A044522 A335479 * A252343 A252336 A044239 Adjacent sequences: A272137 A272138 A272139 * A272141 A272142 A272143 KEYWORD nonn AUTHOR Paolo P. Lava, Apr 21 2016 EXTENSIONS a(12)-a(15) from Michel Marcus, Apr 22 2016 More terms from Altug Alkan, Apr 22 2016 STATUS approved

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Last modified July 23 23:47 EDT 2024. Contains 374575 sequences. (Running on oeis4.)