64722
domain: N
Appears in sequences
- Denominators of Bernoulli numbers B_{2n}.at n=33A002445
- Denominators of Bernoulli numbers B_0, B_1, B_2, B_4, B_6, ...at n=34A006954
- Denominator of Sum_{p prime, p-1 divides 2*n} 1/p.at n=32A027762
- "BGK" (reversible, element, unlabeled) transform of 1,3,5,7,...at n=13A032064
- Distinct values of denominators of Bernoulli numbers B(2n) in order of their appearance as n grows.at n=20A090126
- Numbers k such that the value pi(k), the number of primes <= k, can be obtained deleting some of the repeating adjacent digits of k.at n=22A113898
- A051717(2n).at n=33A132084
- Denominators of expansion of e.g.f. x^2/(2*(cos(x)-1)), even powers only.at n=33A132095
- a(0)=3, a(n)=A002445(n) for n >= 1.at n=33A140814
- 1 followed by A027760, a variant of Bernoulli number denominators.at n=66A141056
- a(n) = A165641(n+1)/A165641(n).at n=65A165886
- a(n) = denominator(Bernoulli(prime(n) - 1)).at n=18A166062
- Bernoulli denominators A141056(n), with the exception a(1)=1.at n=66A176591
- Denominators for generalized Bernoulli numbers B[5,j](n), for j=1..4, n >= 0.at n=66A288872
- a(n) = (2*n+1)*denominator((2*n+1)*Bernoulli(2*n)).at n=33A326580
- a(n) = denominator(denominator(Bernoulli'(n, x)) / denominator(Bernoulli(n, 1))).at n=66A366152
- a(n) = denominator(Bernoulli(n, x)) / denominator(Bernoulli'(n, x)).at n=66A366571