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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
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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified July 24 18:34 EDT 2021. Contains 346273 sequences. (Running on oeis4.)