login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A029848 a(n) = 1 + C(2*n,n) + C(3*n,n). 2
3, 6, 22, 105, 566, 3256, 19489, 119713, 748342, 4735446, 30229772, 194242153, 1254381857, 8132826045, 52900345681, 345022543105, 2255449994038, 14773402692946, 96935423713906, 637019314585501 (list; graph; refs; listen; history; text; internal format)
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: A220166 A220167 A243336 * A117850 A090910 A256674

Adjacent sequences:  A029845 A029846 A029847 * A029849 A029850 A029851

KEYWORD

nonn

AUTHOR

N. J. A. Sloane

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified June 5 09:20 EDT 2020. Contains 334829 sequences. (Running on oeis4.)