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Numbers k such that the numerator of Bernoulli(2k) is divisible by the square of 67, the third irregular prime.
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%I #10 Feb 16 2025 08:32:53

%S 1646,1943,3857,4154,4489,6068,6365,8279,8576,8978,10490,10787,12701,

%T 12998,13467,14912,15209,17123,17420,17956

%N Numbers k such that the numerator of Bernoulli(2k) is divisible by the square of 67, the third irregular prime.

%H Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/BernoulliNumber.html">Bernoulli Number</a>.

%t Select[ Range[ 9695], Mod[ Numerator[ BernoulliB[2# ]], 67^2] == 0 &]

%Y Cf. A000928, A091216, A092221.

%K nonn,changed

%O 1,1

%A _Robert G. Wilson v_, Feb 26 2004

%E More terms from _Eric W. Weisstein_, Mar 19 2004