Column 2 of triangle T=A167015: a(n) = T(n+2,2) = [T^(n+2)](n-1,0) for n>0 with a(0)=1.
A167018
Column 2 of triangle T=A167015: a(n) = T(n+2,2) = [T^(n+2)](n-1,0) for n>0 with a(0)=1.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =20a(4) =149a(5) =1491a(6) =18612a(7) =275856a(8) =4699180a(9) =89993827a(10) =1907644760a(11) =44253266889
External references
- oeis: A167018