A026580 T(n,0) + T(n,1) + ... + T(n,n), T given by A026568.

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

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

Cf. A026568.

Sequence in context: A076883 A140832 A326793 * A092247 A331233 A108360

Adjacent sequences: A026577 A026578 A026579 * A026581 A026582 A026583

Keyword

nonn

Author

Clark Kimberling

Status

approved