a(n) = n^2 * B(n) where B(n) are the Bell numbers, A000110.

A204618

a(n) = n^2 * B(n) where B(n) are the Bell numbers, A000110.

Terms

    a(0) =0a(1) =1a(2) =8a(3) =45a(4) =240a(5) =1300a(6) =7308a(7) =42973a(8) =264960a(9) =1712907a(10) =11597500a(11) =82106970a(12) =606757968a(13) =4671909853a(14) =37416267112a(15) =311165672625

External references