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A129463 Row sums of triangle A129462 (v=2 member of a certain family). 1
1, 0, -1, -4, -39, -680, -18425, -713820, -37390255, -2543067280, -217799766225, -22928327328500, -2909576503498775, -437960283393276600, -77145678498655849225, -15720035935018890359500, -3668950667796545284209375, -972327797466833893742228000 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

COMMENTS

See A129462 for the M. Bruschi et al. reference.

LINKS

Table of n, a(n) for n=0..17.

FORMULA

a(n)=sum(A129462(n,m),m=0..n),n>=0.

From Vaclav Kotesovec, Aug 24 2016: (Start)

a(n) = 2*(n-2)*(n-1)*a(n-1) - (n-3)^2*(n-1)^2*a(n-2).

a(n) ~ c * n^(2*n+(sqrt(5)-3)/2) / exp(2*n), where c = -2.3203776630375605070105975273368548459...

(End)

CROSSREFS

Cf. A129458 (row sums v=1 member).

Sequence in context: A066399 A065760 A132612 * A299426 A188418 A136653

Adjacent sequences:  A129460 A129461 A129462 * A129464 A129465 A129466

KEYWORD

sign,easy

AUTHOR

Wolfdieter Lang May 04 2007

STATUS

approved

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Last modified October 17 16:51 EDT 2019. Contains 328120 sequences. (Running on oeis4.)