A binomial recursion : a(n) = p(n) (see formula).

A135147

A binomial recursion : a(n) = p(n) (see formula).

Terms

    a(0) =1a(1) =4a(2) =25a(3) =188a(4) =1671a(5) =17190a(6) =201125a(7) =2638984a(8) =38390179a(9) =613363466a(10) =10678267425a(11) =201215691660

External references