The On-Line Encyclopedia of Integer Sequences® (OEIS®)

Revision History for A028683 (Underlined text is an addition; strikethrough text is a ~~deletion~~.)
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A028683

Pseudo Galois numbers for d=21.
(history; published version)

#2 by N. J. A. Sloane at Fri May 16 03:00:00 EDT 2003

KEYWORD

nonn,new

nonn

AUTHOR

Olivier Gerard (ogerard@(AT)ext.jussieu.fr)

#1 by N. J. A. Sloane at Sat Dec 11 03:00:00 EST 1999

	NAME	`Pseudo Galois numbers for d=21.`
	DATA	`1, 420, 81496800, 6988909668048000, 264339188251171547754240000, 4409145118315866486641282521305984000000, 32432910584848683243891703579686352553931989191680000000`
	OFFSET	`0,2`
	FORMULA	`a(n) = p^n Product (p^n - p^k) for k=0 to n-1`
	MATHEMATICA	`FoldList[ #1*21^#2 (21^#2-1)&, 1, Range[ 20 ] ]`
	KEYWORD	`nonn`
	AUTHOR	`Olivier Gerard (ogerard@ext.jussieu.fr)`
	STATUS	`approved`

Last modified August 30 05:37 EDT 2024. Contains 375526 sequences. (Running on oeis4.)