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Search: id:A126629
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| A126629 |
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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 digits 1 and 2, at least one of digits 3,4,5 and at least one of digits 6,7,8,9. |
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+0
1
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| 8, 64, 506, 3916, 29498, 215524, 1527506, 10528876, 70841738, 467044084, 3027621506, 19356463036, 122355512378, 766290978244, 4762898595506, 29420807536396, 180813134269418, 1106606890266004, 6749433735297506
(list; graph; listen)
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OFFSET
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1,1
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LINKS
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Milan Janjic, Enumerative Formulas for Some Functions on Finite Sets
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FORMULA
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a(n)=12*6^n-30*5^n+34*4^n-21*3^n+7*2^n-1
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EXAMPLE
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a(8)=10528876
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MAPLE
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f:=n->12*6^n-30*5^n+34*4^n-21*3^n+7*2^n-1;
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CROSSREFS
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Cf. A125630, A125948, A125947, A125946, A125945, A125910, A125909, A125908, A125880, A125897, A125904, A125858.
Sequence in context: A045825 A122093 A127426 this_sequence A125498 A125908 A001018
Adjacent sequences: A126626 A126627 A126628 this_sequence A126630 A126631 A126632
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KEYWORD
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nonn
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AUTHOR
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Aleksandar M. Janjic and Milan R. Janjic (agnus(AT)blic.net), Feb 08 2007
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