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

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A289513 Expansion of 1/j^6 where j is the elliptic modular invariant (A000521). 7
1, -4464, 10442952, -17039255232, 21778105580100, -23220214437622752, 21481529172149572992, -17710788549056167790208, 13266671900249257490243610, -9160802613358728056593238800, 5897060690397181329853257045696 (list; graph; refs; listen; history; text; internal format)
OFFSET

6,2

LINKS

Seiichi Manyama, Table of n, a(n) for n = 6..416

FORMULA

a(n) ~ (-1)^n * 2^(3*k) * Pi^(12*k) * exp(Pi*sqrt(3)*n) * n^(3*k - 1) / (3^(3*k) * Gamma(1/3)^(18*k) * Gamma(3*k)), set k = 6. - Vaclav Kotesovec, Mar 07 2018

MATHEMATICA

a[n_] := SeriesCoefficient[1/(1728*KleinInvariantJ[-Log[q]*I/(2*Pi)])^6, {q, 0, n}]; Table[a[n], {n, 6, 16}] (* Jean-François Alcover, Nov 02 2017 *)

CROSSREFS

Cf. A000521 (j).

1/j^k: A066395 (k=1), A288727 (k=2), A289454 (k=3), A289455 (k=4), A289512 (k=5), this sequence (k=6), A289514 (k=7), A289515 (k=8), A289516 (k=9), A289517 (k=10).

Sequence in context: A185767 A089202 A250977 * A345590 A345848 A221007

Adjacent sequences:  A289510 A289511 A289512 * A289514 A289515 A289516

KEYWORD

sign

AUTHOR

Seiichi Manyama, Jul 07 2017

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.

License Agreements, Terms of Use, Privacy Policy. .

Last modified June 30 09:38 EDT 2022. Contains 354920 sequences. (Running on oeis4.)