272118

Appears in sequences

• Denominators of Bernoulli numbers B_{2n}.at n=45A002445
• Denominators of Bernoulli numbers B_0, B_1, B_2, B_4, B_6, ...at n=46A006954
• Denominator of Sum_{p prime, p-1 divides 2*n} 1/p.at n=44A027762
• Distinct values of denominators of Bernoulli numbers B(2n) in order of their appearance as n grows.at n=28A090126
• A051717(2n).at n=45A132084
• Denominators of expansion of e.g.f. x^2/(2*(cos(x)-1)), even powers only.at n=45A132095
• a(0)=3, a(n)=A002445(n) for n >= 1.at n=45A140814
• Smallest squarefree term of adjacent squarefree pairs in the sequence of practical numbers (A005153).at n=27A268156
• a(n) = Sum_{k=0..floor(3*n/17)} binomial(3*n-16*k,k).at n=36A392352