a(n) = (2+n)*(2*a(n-1) - (n-2)*a(n-2)) with a(0)=a(1)=1.
A361528
a(n) = (2+n)*(2*a(n-1) - (n-2)*a(n-2)) with a(0)=a(1)=1.
Terms
- a(0) =1a(1) =1a(2) =8a(3) =75a(4) =804a(5) =9681a(6) =129168a(7) =1889379a(8) =30037500a(9) =515342817a(10) =9484627608a(11) =186305208219
External references
- oeis: A361528