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A112001 One fourth of fourth column (k=3) of triangle A111999. 1
6, -231, 6608, -176330, 4714710, -130014885, 3745101360, -113311778580, 3608430175350, -120977128347075, 4267052705916000, -158151857368254750, 6150573832264611750, -250598489767931930625, 10680148143520635780000, -475373543975596731465000 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..15.

FORMULA

a(n)=A112492(n+4, 3)/4, n>=0.

Conjecture: +n*(20*n^2+75*n+67)*a(n) +(2*n+5)*(n+2)*(20*n^2+115*n+162)*a(n-1)=0. - R. J. Mathar, Jul 09 2017

CROSSREFS

Sequence in context: A177043 A309009 A117064 * A286314 A099124 A172862

Adjacent sequences:  A111998 A111999 A112000 * A112002 A112003 A112004

KEYWORD

sign,easy

AUTHOR

Wolfdieter Lang, Sep 12 2005

STATUS

approved

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Last modified May 20 17:47 EDT 2022. Contains 353876 sequences. (Running on oeis4.)