a(0)=1; a(1)=2; a(2)=6; a(n+1) = 2*(n+1)*a(n) - n^2*a(n-1), n > 1.
A156626
a(0)=1; a(1)=2; a(2)=6; a(n+1) = 2*(n+1)*a(n) - n^2*a(n-1), n > 1.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =28a(4) =170a(5) =1252a(6) =10774a(7) =105764a(8) =1164298a(9) =14188468a(10) =189461222a(11) =2749300084a(12) =43058394154a(13) =723619035908
External references
- oeis: A156626