The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A084940

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A084940

Heptagorials: n-th polygorial for k=7.
(history; published version)

#36 by R. J. Mathar at Mon May 02 08:02:32 EDT 2022

STATUS

editing

approved

#35 by R. J. Mathar at Mon May 02 08:02:29 EDT 2022

FORMULA

D-finite with recurrence 2*a(n) = n*(5*n-3)*a(n-1). - R. J. Mathar, Mar 12 2019

STATUS

approved

editing

#34 by Alois P. Heinz at Wed Sep 04 08:11:14 EDT 2019

STATUS

editing

approved

#33 by Alois P. Heinz at Wed Sep 04 08:11:11 EDT 2019

LINKS

Daniel Dockery, <a href="https://web.archive.org/web/20140617132401/http://danieldockery.com/res/math/polygorials.pdf"> Polygorials, Special "Factorials" of Polygonal Numbers</a>, preprint, 2003.

STATUS

proposed

editing

#32 by Petros Hadjicostas at Wed Sep 04 07:19:06 EDT 2019

STATUS

editing

proposed

#31 by Petros Hadjicostas at Wed Sep 04 07:18:52 EDT 2019

LINKS

Daniel Dockery, <a href="https://web.archive.org/web/20140617132401/http://danieldockery.com/res/math/polygorials.pdf"> Polygorials, Special "Factorials" of Polygonal Numbers</a>, preprint, 2003.

STATUS

approved

editing

#30 by Harvey P. Dale at Mon Jul 29 16:14:06 EDT 2019

STATUS

editing

approved

#29 by Harvey P. Dale at Mon Jul 29 16:14:04 EDT 2019

MATHEMATICA

Join[{1}, FoldList[Times, PolygonalNumber[7, Range[20]]]] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Jul 29 2019 *)

STATUS

approved

editing

#28 by R. J. Mathar at Tue Mar 12 06:04:47 EDT 2019

STATUS

editing

approved

#27 by R. J. Mathar at Tue Mar 12 06:04:41 EDT 2019

FORMULA

2*a(n) = n*(5*n-3)*a(n-1). - R. J. Mathar, Mar 12 2019

STATUS

approved

editing