id:A125904 - OEIS Search Results

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

+0
18

10, 100, 1000, 9976, 98920, 971440, 9420400, 90005176, 846101080, 7822770880, 71163913600, 637585923976, 5633160763240, 49148451899920, 424055315011600, 3623013325068376, 30689130457473400, 258015134469182560 (list; graph; listen)

	OFFSET	`1,1`
	LINKS	`Milan Janjic, Enumerative Formulas for Some Functions on Finite Sets`
	FORMULA	`a(n)=208^n-707^n+1206^n-1255^n+844^n-363^n+9*2^n-1`
	EXAMPLE	`a(8)=90005176`
	MAPLE	`f:=n->208^n-707^n+1206^n-1255^n+844^n-363^n+9*2^n-1;`
	CROSSREFS	`Cf. A125630.` `Sequence in context: A072083 A029793 A136877 this_sequence A115796 A136857 A136866` `Adjacent sequences: A125901 A125902 A125903 this_sequence A125905 A125906 A125907`
	KEYWORD	`nonn,base`
	AUTHOR	`Aleksandar M. Janjic and Milan R. Janjic, (agnus(AT)blic.net), Feb 03 2007`

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Last modified November 25 08:46 EST 2009. Contains 167481 sequences.

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