A111555 Column 2 of triangle A111553.

1, 3, 16, 116, 1016, 10176, 113216, 1375456, 18047296, 253815936, 3805221376, 60558070016, 1019617312256, 18111737604096, 338602832961536, 6648048064792576, 136810876329865216, 2945671077411987456

Offset: 0

Author

Paul D. Hanna, Aug 07 2005

Keywords

• nonn

Crossrefs

Cf. A111553, A111531.

Programs

PARI

{a(n)=if(n<0,0,(matrix(n+3,n+3,m,j,if(m==j,1,if(m==j+1,-m+1, -(m-j-1)*polcoeff(log(sum(i=0,m,(i+3)!/3!*x^i)),m-j-1))))^-1)[n+3,3])}