The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A197880 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing entries 1-10 | older changes

A197880

Squarefree part of ((2n-1)!)^(2n-3).
(history; published version)

#21 by Sean A. Irvine at Fri May 10 23:59:30 EDT 2019

STATUS

proposed

approved

#20 by Michel Marcus at Fri May 10 00:49:07 EDT 2019

STATUS

editing

proposed

#19 by Michel Marcus at Fri May 10 00:49:04 EDT 2019

CROSSREFS

Cf. A007913, A134367, A198481.

STATUS

proposed

editing

#18 by Jon E. Schoenfield at Fri May 10 00:47:20 EDT 2019

STATUS

editing

proposed

#17 by Jon E. Schoenfield at Fri May 10 00:47:18 EDT 2019

FORMULA

a(n) = A007913( A134367(2*n-1)). - _R. J. Mathar, _, Oct 25 2011

MAPLE

seq(A198480(n), n=1..10) ; # _R. J. Mathar, _, Oct 25 2011

STATUS

approved

editing

#16 by Russ Cox at Sat Mar 31 10:22:18 EDT 2012

AUTHOR

_Artur Jasinski (grafix(AT)csl.pl), _, Oct 25 2011

Discussion

Sat Mar 31

10:22

OEIS Server: https://oeis.org/edit/global/339

#15 by T. D. Noe at Wed Nov 09 12:17:41 EST 2011

STATUS

editing

approved

#14 by T. D. Noe at Wed Nov 09 12:17:35 EST 2011

DATA

1, 6, 30, 35, 70, 77, 3003, 1430, 24310, 230945, 969969, 4056234, 676039, 312018, 1292646, 33393355, 2203961430, 90751353, 3357800061, 1531628098, 156991880045, 5786272150230, 105204948186, 107492012277, 35830670759, 3654728417418, 14900046624858, 136583760727865, 108993841060836270, 110873045217057585

STATUS

proposed

editing

#13 by Artur Jasinski at Wed Nov 09 03:50:59 EST 2011

STATUS

editing

proposed

#12 by R. J. Mathar at Tue Oct 25 16:42:12 EDT 2011

NAME

Squarefree part of ((2n-1)!)^(2n-3).

CROSSREFS

Cf. A134367, A198481.

Discussion

Wed Nov 09

02:04

OEIS Server: This sequence has not been edited or commented on for a week
yet is not proposed for review.  If it is ready for review, please
visit https://oeis.org/draft/A197880 and click the button that reads
"These changes are ready for review by an OEIS Editor."

Thanks.
  - The OEIS Server