A029848 - OEIS

A029848

a(n) = 1 + C(2*n,n) + C(3*n,n).

3, 6, 22, 105, 566, 3256, 19489, 119713, 748342, 4735446, 30229772, 194242153, 1254381857, 8132826045, 52900345681, 345022543105, 2255449994038, 14773402692946, 96935423713906, 637019314585501

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OFFSET

0,1

LINKS

Seiichi Manyama, Table of n, a(n) for n = 0..1000

MAPLE

a:=n->1+binomial(2*n, n)+binomial(3*n, n): seq(a(n), n=0..20); # Muniru A Asiru, Aug 12 2018

MATHEMATICA

Table[1+Binomial[2n, n]+Binomial[3n, n], {n, 0, 30}] (* Harvey P. Dale, Jan 09 2019 *)

PROG

(PARI) a(n) = 1 + binomial(2*n, n) + binomial(3*n, n); \\ Michel Marcus, Aug 12 2018

(GAP) List([0..20], n->1+Binomial(2*n, n)+Binomial(3*n, n)); # Muniru A Asiru, Aug 12 2018

CROSSREFS

Cf. A000984, A096131.

Sequence in context: A220167 A243336 A344605 * A366483 A117850 A090910

Adjacent sequences: A029845 A029846 A029847 * A029849 A029850 A029851

KEYWORD

nonn

AUTHOR

N. J. A. Sloane

STATUS

approved