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Search: id:A155872
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| 2, 21, 221, 2331, 24641, 261051, 2771561, 29487171, 314358881, 3357947691, 35937424601, 385311670611
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OFFSET
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0,1
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COMMENT
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a(n) gives the combined total number of n digit numbers [preceding zeros allowed] in base 10 and 11
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FORMULA
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a(n)=10^n + 11^n
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EXAMPLE
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a(0)=10^0+11^0=2; a(3)=10^3+11^3=2331
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CROSSREFS
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Sequence in context: A163068 A109684 A137287 this_sequence A106412 A058476 A099748
Adjacent sequences: A155869 A155870 A155871 this_sequence A155873 A155874 A155875
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KEYWORD
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nonn
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AUTHOR
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Avik Roy (avik_3.1416(AT)yahoo.co.in), Jan 29 2009
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