A111561 Column 1 of A111560, which is the matrix log of A111553.

0, 2, 7, 44, 354, 3328, 35144, 407984, 5137824, 69566144, 1006372864, 15481560064, 252326173824, 4344015683584, 78793242566144, 1502374856981504, 30052439647908864, 629485600310349824, 13783057303819485184

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+3)!/3!*x^i)), m-j-1))))); if(n<0, 0, sum(i=1, #M, (M^0-M)^i/i)[n+2, 2])}

Crossrefs

Cf. A111560, A111553.

Sequence in context: A041507 A158107 A145073 * A000155 A077045 A178012

Adjacent sequences: A111558 A111559 A111560 * A111562 A111563 A111564

Keyword

nonn

Author

Paul D. Hanna, Aug 07 2005

Status

approved