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A112693 Row sums of array A112692. 2
1, -4, -48, 2304, 552960, -796262400, -8026324992000, 647242847354880000, 469742968896277708800000, -3409206571061625099386880000000, -272169233711505353534412423168000000000 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..10.

FORMULA

a(n)=sum(A112692(k, m), m=0..((k+1)*(k+2)/2)-1), k>=0.

Let A(x)=sum(k>=0, |a(k)|*x^k  ), then A(x)= G(0)/(4*x)- 1/(2*x), where G(k)= 1  + 1/(1 - 2*x*(2*k+1)!/(2*x*(2*k+1)! + 1/(1  + 1/(1 - 2*x*(2*k+2)!/(2*x*(2*k+2)! + 1/G(k+1) ))))); (continued fraction). - Sergei N. Gladkovskii, Jul 10 2013

CROSSREFS

Unsigned row sums A112694.

Sequence in context: A011266 A197927 A100568 * A239162 A136384 A123373

Adjacent sequences:  A112690 A112691 A112692 * A112694 A112695 A112696

KEYWORD

sign,easy

AUTHOR

Wolfdieter Lang, Oct 14 2005

STATUS

approved

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Last modified August 7 23:50 EDT 2022. Contains 355995 sequences. (Running on oeis4.)