a(n) = (n+1)*(a(n-1) +a(n-2)) n>1, a(0)=1,a(1)=0.

A176408

a(n) = (n+1)*(a(n-1) +a(n-2)) n>1, a(0)=1,a(1)=0.

Terms

    a(0) =1a(1) =0a(2) =3a(3) =12a(4) =75a(5) =522a(6) =4179a(7) =37608a(8) =376083a(9) =4136910a(10) =49642923a(11) =645357996a(12) =9035011947a(13) =135525179202

External references