A125836 - OEIS

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A125836

Numbers whose base 8 or octal representation is 555555555......5.

0, 5, 45, 365, 2925, 23405, 187245, 1497965, 11983725, 95869805, 766958445, 6135667565, 49085340525, 392682724205, 3141461793645, 25131694349165, 201053554793325, 1608428438346605, 12867427506772845, 102939420054182765 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	FORMULA	`a(n)=5(8^(n-1)-1)/7.` `a(n)=8a(n-1)+5 (with a(1)=0) [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Sep 30 2010]`
	EXAMPLE	`Octal...............decimal` `0........................0` `5........................5` `55......................45` `555....................365` `5555..................2925` `55555................23405` `555555..............187245` `5555555............1497965` `55555555..........11983725` `555555555.........95869805` `5555555555.......766958445` `etc. ...............etc.`
	MAPLE	`seq(5*(8^n-1)/7, n=0..20);`
	CROSSREFS	`Sequence in context: A081070 A043025 A190540 * A001260 A088505 A067403` `Adjacent sequences: A125833 A125834 A125835 * A125837 A125838 A125839`
	KEYWORD	`easy,nonn`
	AUTHOR	`Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Feb 03 2007`

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Last modified February 17 16:49 EST 2012. Contains 206058 sequences.