id:A125630 - OEIS Search Results

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a(n) is the number of integers k less than 10^n such that the decimal representation of k lacks the digit 1 and at least one of digits 2,3,4,5,6,7,8,9.

+0
30

9, 81, 729, 6561, 59049, 531441, 4782969, 43006401, 385606089, 3440214801, 30482931609, 267934415841, 2334817386729, 20170171738161, 172797111134649, 1468818073594881, 12396189742824969, 103943773544221521 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Note that the first seven terms of the sequence are powers of 9.`
	LINKS	`Milan Janjic, Enumerative Formulas for Some Functions on Finite Sets`
	FORMULA	`f(n)=88^n-287^n+566^n-705^n+564^n-283^n+8*2^n-1.`
	EXAMPLE	`f(5)=59049`
	MAPLE	`f:=n->88^n-287^n+566^n-705^n+564^n-283^n+8*2^n-1;`
	CROSSREFS	`Sequence in context: A125910 A125947 A120997 this_sequence A100062 A001019 A074118` `Adjacent sequences: A125627 A125628 A125629 this_sequence A125631 A125632 A125633`
	KEYWORD	`nonn`
	AUTHOR	`Aleksandar M. Janjic and Milan R. Janjic (agnus(AT)blic.net), Jan 28 2007, Feb 13 2007`

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Last modified July 23 17:35 EDT 2008. Contains 142285 sequences.

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