The OEIS is supported by the many generous donors to the OEIS Foundation.

 Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 60th year, we have over 367,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”). Other ways to Give
 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A162637 G.f. is the polynomial (Product_{k=1..17} (1 - x^(3*k)))/(1-x)^17. 1
 1, 17, 153, 968, 4828, 20196, 73643, 240295, 714969, 1967393, 5061733, 12282075, 28304167, 62307023, 131649309, 268075466, 527904757, 1008342693, 1873000449, 3390989490, 5995666674, 10371347659, 17579210264, 29237321394, 47774409494 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS This is a row of the triangle in A162499. Only finitely many terms are nonzero. LINKS G. C. Greubel, Table of n, a(n) for n = 0..442 MAPLE m:=17: seq(coeff(series(mul((1-x^(3*k)), k=1..m)/(1-x)^m, x, n+1), x, n), n=0..24); # Muniru A Asiru, Jul 07 2018 MATHEMATICA CoefficientList[Series[Times@@(1-x^(3*Range[17]))/(1-x)^17, {x, 0, 50}], x] (* G. C. Greubel, Jul 06 2018 *) PROG (PARI) x='x+O('x^50); A = prod(k=1, 17, (1-x^(3*k)))/(1-x)^17; Vec(A) \\ G. C. Greubel, Jul 0762018 (Magma) m:=50; R:=PowerSeriesRing(Integers(), m); F:=(&*[(1-x^(3*k)): k in [1..17]])/(1-x)^17; Coefficients(R!(F)); // G. C. Greubel, Jul 06 2018 CROSSREFS Sequence in context: A221737 A139617 A188353 * A247613 A010969 A022582 Adjacent sequences: A162634 A162635 A162636 * A162638 A162639 A162640 KEYWORD nonn AUTHOR N. J. A. Sloane, Dec 02 2009 STATUS approved

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

Last modified December 6 22:36 EST 2023. Contains 367616 sequences. (Running on oeis4.)