A111550 Column 1 of A111549, which is the matrix log of A111544.

0, 2, 6, 32, 222, 1824, 17016, 176112, 1993392, 24438960, 322294896, 4548010032, 68385367152, 1091838106800, 18454096189296, 329306074785072, 6189015238217712, 122232512688657840, 2531600753529542256

Offset

0,2

Links

Table of n, a(n) for n=0..18.

Prog

(PARI) {a(n)=local(M=matrix(n+2, n+2, m, j, if(m==j, 1, if(m==j+1, -m+1, -(m-j-1)*polcoeff(log(sum(i=0, m, (i+2)!/2!*x^i)), m-j-1))))); if(n<0, 0, sum(i=1, #M, (M^0-M)^i/i)[n+2, 2])}

Crossrefs

Cf. A111549, A111544.

Sequence in context: A361354 A357664 A321086 * A261398 A009686 A012318

Adjacent sequences: A111547 A111548 A111549 * A111551 A111552 A111553

Keyword

nonn

Author

Paul D. Hanna, Aug 07 2005

Status

approved