A155872 - OEIS

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A155872

a(n)=10^n + 11^n; n>=0

2, 21, 221, 2331, 24641, 261051, 2771561, 29487171, 314358881, 3357947691, 35937424601, 385311670611 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,1`
	COMMENTS	`a(n) gives the combined total number of n digit numbers [preceding zeros allowed] in base 10 and 11`
	FORMULA	`a(n)=10^n + 11^n`
	EXAMPLE	`a(0)=10^0+11^0=2; a(3)=10^3+11^3=2331`
	CROSSREFS	`Sequence in context: A163068 A109684 A137287 * A106412 A058476 A099748` `Adjacent sequences: A155869 A155870 A155871 * A155873 A155874 A155875`
	KEYWORD	`nonn`
	AUTHOR	`Avik Roy (avik_3.1416(AT)yahoo.co.in), Jan 29 2009`

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Last modified February 17 21:13 EST 2012. Contains 206085 sequences.