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Search: id:A126628
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| A126628 |
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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 and at least one of digits 5,6,7,8,9. |
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+0
1
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| 8, 62, 470, 3506, 25718, 184682, 1294910, 8867186, 59423078, 390804602, 2529567950, 16157024066, 102070798838, 639011269322, 3970835898590, 24524390352146, 150705922308998, 922285972770842, 5624983337550830
(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)=10*6^n-25*5^n+30*4^n-20*3^n+7*2^n-1
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EXAMPLE
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a(8)=8867186
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MAPLE
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f:=n->10*6^n-25*5^n+30*4^n-20*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.
Adjacent sequences: A126625 A126626 A126627 this_sequence A126629 A126630 A126631
Sequence in context: A082179 A044527 A056054 this_sequence A085353 A125396 A053095
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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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