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A141351 a(n)=C(n)+1-0^n where C(n)=A000108(n). 6
1, 2, 3, 6, 15, 43, 133, 430, 1431, 4863, 16797, 58787, 208013, 742901, 2674441, 9694846, 35357671, 129644791, 477638701, 1767263191, 6564120421, 24466267021, 91482563641, 343059613651, 1289904147325 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

Hankel transform is A141352.

LINKS

Table of n, a(n) for n=0..24.

FORMULA

G.f.: c(x)+x/(1-x), where c(x) is the g.f. of A000108.

Conjecture: (n+1)*a(n) +2*(-3*n+1)*a(n-1) +(9*n-13)*a(n-2) +2*(-2*n+5)*a(n-3)=0. - R. J. Mathar, Oct 15 2014

CROSSREFS

Cf. A141353.

Sequence in context: A036418 A120589 A110181 * A088793 A216144 A121688

Adjacent sequences:  A141348 A141349 A141350 * A141352 A141353 A141354

KEYWORD

easy,nonn

AUTHOR

Paul Barry, Jun 27 2008

STATUS

approved

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Last modified October 20 20:20 EDT 2018. Contains 316402 sequences. (Running on oeis4.)