27896

Appears in sequences

• a(n) = Sum_{k=0..5} binomial(n,k).at n=21A006261
• A(x) satisfies A005408(x) = A(x)/A(x^2), A005408 = odd numbers.at n=24A173283
• Numbers k such that Bernoulli number B_{k} has denominator 61410.at n=14A295591
• Number of subsets of {1..n} such that it is possible to choose a different prime factor of each element.at n=22A370582
• Number of subsets of {1..n} containing n such that it is possible to choose a different prime factor of each element (choosable).at n=23A370586
• a(n) = Sum_{k=0..n} binomial(4*n+1,k).at n=5A386811