This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A006954 M1689 N0667 #33 Nov 01 2024 02:07:09
%S A006954 1,2,6,30,42,30,66,2730,6,510,798,330,138,2730,6,870,14322,510,6,
%T A006954 1919190,6,13530,1806,690,282,46410,66,1590,798,870,354,56786730,6,
%U A006954 510,64722,30,4686,140100870,6,30,3318,230010,498,3404310,6,61410,272118,1410,6,4501770
%N A006954 Denominators of Bernoulli numbers B_0, B_1, B_2, B_4, B_6, ...
%C A006954 These are the denominators if you hurriedly look down a list of the nonzero Bernoulli numbers without noticing that B_1 has been included.
%C A006954 From the von Staudt-Clausen theorem, denominator(B_2n) = product of primes p such that (p-1)|2n.
%D A006954 M. Abramowitz and I. A. Stegun, eds., Handbook of Mathematical Functions, National Bureau of Standards Applied Math. Series 55, Tenth Printing, 1972, p. 260.
%D A006954 Steven R. Finch, Mathematical Constants, Encyclopedia of Mathematics and its Applications, vol. 94, Cambridge University Press, 2003, Section 1.6.1, p. 41.
%D A006954 G. H. Hardy and E. M. Wright, An Introduction to the Theory of Numbers, 5th ed., Oxford Univ. Press, 1979, Th. 118.
%D A006954 H. Rademacher, Topics in Analytic Number Theory, Springer, 1973, Chap. 1.
%D A006954 N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
%D A006954 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
%H A006954 M. Abramowitz and I. A. Stegun, eds., <a href="http://www.convertit.com/Go/ConvertIt/Reference/AMS55.ASP">Handbook of Mathematical Functions</a>, National Bureau of Standards, Applied Math. Series 55, Tenth Printing, 1972 [alternative scanned copy].
%H A006954 M. Abramowitz and I. A. Stegun, eds., <a href="http://www.convertit.com/Go/ConvertIt/Reference/AMS55.ASP">Handbook of Mathematical Functions</a>, National Bureau of Standards Applied Math. Series 55, Tenth Printing, 1972, p. 260.
%H A006954 Y. Puri and T. Ward, <a href="http://www.cs.uwaterloo.ca/journals/JIS/index.html">Arithmetic and growth of periodic orbits</a>, J. Integer Seqs., Vol. 4 (2001), #01.2.1.
%H A006954 <a href="/index/Be#Bernoulli">Index entries for sequences related to Bernoulli numbers.</a>
%F A006954 E.g.f: t/(e^t - 1).
%t A006954 Join[{1,2},Denominator[BernoulliB[Range[2,100,2]]]] (* _Harvey P. Dale_, Apr 11 2016 *)
%Y A006954 Cf. A000367, A002445, A027762.
%K A006954 nonn,frac
%O A006954 0,2
%A A006954 _N. J. A. Sloane_, _Simon Plouffe_
%E A006954 More terms from _T. D. Noe_, Mar 31 2004