A102588 Absolute row sums of triangle A102587, which is equal to the matrix inverse of triangle A094531 (the right-hand side of trinomial table A027907).

1, 2, 4, 6, 12, 22, 34, 58, 112, 186, 320, 574, 954, 1640, 2926, 5180, 8524, 14928, 25514, 44994, 77674, 138446, 233402, 395832, 704376, 1223902, 2134912, 3628044, 6288414, 10626878, 19171626, 32535060, 57067872, 97164452, 169386950

Offset

0,2

Links

Table of n, a(n) for n=0..34.

Prog

(PARI) {a(n)=local(A); A=matrix(n+1, n+1, r, c, if(r<c, 0, polcoeff((1+x+x^2)^(r-1), r+c-2))); return(sum(k=0, n, abs((A^-1)[n+1, k+1])))}

Crossrefs

Cf. A094531, A102587.

Sequence in context: A328079 A321739 A073660 * A005303 A292320 A057575

Adjacent sequences: A102585 A102586 A102587 * A102589 A102590 A102591

Keyword

nonn

Author

Paul D. Hanna, Jan 22 2005

Status

approved