id:A023000 - OEIS Search Results

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(7^n - 1)/6.

+0
21

0, 1, 8, 57, 400, 2801, 19608, 137257, 960800, 6725601, 47079208, 329554457, 2306881200, 16148168401, 113037178808, 791260251657, 5538821761600, 38771752331201, 271402266318408, 1899815864228857, 13298711049602000 (list; graph; listen)

	OFFSET	`0,3`
	COMMENT	`7^(floor(7^n/6)) is the highest power of 7 dividing (7^n)! - Benoit Cloitre (benoit7848c(AT)orange.fr), Feb 04 2002`
	LINKS	`Eric Weisstein's World of Mathematics, Link to a section of The World of Mathematics.`
	MAPLE	`a:=n->sum(7^(n-j), j=1..n): seq(a(n), n=0..20); - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Jan 04 2007`
	CROSSREFS	`Sequence in context: A096711 A079926 A108666 this_sequence A097114 A022038 A015453` `Adjacent sequences: A022997 A022998 A022999 this_sequence A023001 A023002 A023003`
	KEYWORD	`easy,nonn`
	AUTHOR	`David W. Wilson (davidwwilson(AT)comcast.net)`

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Last modified July 4 18:25 EDT 2008. Contains 140886 sequences.

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