26349

Appears in sequences

• Numbers n such that n and prime(n) end with the same three digits.at n=23A067841
• Expansion of e.g.f. exp(x) * (sec(exp(x) - 1))^2.at n=7A080832
• a(n) = Sum_{k <= n/2 } binomial(n-2k, 3k+1).at n=21A137357
• Number of binary words of length n containing at least one subword 10^{9}1 and no subwords 10^{i}1 with i<9.at n=57A143289
• Number of compositions of 5*n into parts 3 and 5.at n=13A369845
• Coefficient of x^n in the expansion of ( (1+x) * (1+x^2)^2 )^n.at n=8A370194
• a(n) = Sum_{k=0..floor((2*n+1)/3)} binomial(2*k+1,2*n-3*k+1).at n=15A391600