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A026580 T(n,0) + T(n,1) + ... + T(n,n), T given by A026568. 0
1, 2, 5, 12, 30, 75, 189, 478, 1211, 3076, 7818, 19901, 50680, 129179, 329383, 840336, 2144540, 5474889, 13980493, 35709394, 91228015, 233108456, 595740568, 1522725379, 3892624055, 9952119054, 25446913766, 65072487645 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..27.

FORMULA

Conjecture: n*a(n) +(n-2)*a(n-1) +(-17*n+28)*a(n-2) +5*(-n+4)*a(n-3) +2*(34*n-107)*a(n-4) +16*(n-5)*a(n-5) +32*(-2*n+9)*a(n-6)=0. - R. J. Mathar, Jun 23 2013

CROSSREFS

Sequence in context: A000106 A076883 A140832 * A092247 A108360 A051163

Adjacent sequences:  A026577 A026578 A026579 * A026581 A026582 A026583

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified October 16 08:24 EDT 2018. Contains 316259 sequences. (Running on oeis4.)