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 59th year, we have over 358,000 sequences, and we’ve crossed 10,300 citations (which often say “discovered thanks to the OEIS”). Other ways to Give
 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A232976 Numerators of coefficients in expansion of Product_{k>=1} 1/(1-x^k)^(k/2). 1
 1, 1, 11, 37, 563, 1695, 12255, 36333, 972867, 2946747, 18641221, 55674771, 691993655, 2037484683, 12296580999, 36106933117, 1708708848483, 4955653540051, 28943726818665, 83124892750711, 958302911335293, 2730521640247521, 15561772451632937, 43970981993285115, 993588138105790887, 2785544697144356207, 15601240187271712393, 43442724873393477375, 482971671644633204159 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 COMMENTS This is the square root of the g.f. for planar partitions (A000219). LINKS EXAMPLE 1, 1/2, 11/8, 37/16, 563/128, 1695/256, 12255/1024, 36333/2048, 972867/32768, ... MAPLE mul( 1/(1-x^k)^(k/2), k=1..29) ; taylor(%, x=0, 29) ; gfun[seriestolist](%) ; map(numer, %) ; # R. J. Mathar, Dec 08 2013 CROSSREFS Denominators are A046161. Cf. A000219. Sequence in context: A052432 A104269 A084014 * A084018 A235874 A012820 Adjacent sequences: A232973 A232974 A232975 * A232977 A232978 A232979 KEYWORD nonn,frac AUTHOR N. J. A. Sloane, Dec 07 2013 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 November 29 16:20 EST 2022. Contains 358431 sequences. (Running on oeis4.)