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Search: id:A126631
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| A126631 |
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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 the digit 1, at least one of digits 2,3, at least one of digits 4,5 and at least one of digits 6,7,8,9. |
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+0
1
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| 9, 77, 633, 5021, 38409, 283277, 2019033, 13963901, 94144809, 621444077, 4031587833, 25787305181, 163054382409, 1021372934477, 6349128459033, 39222102764861, 241061530639209, 1475385002210477, 8998880800344633
(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)=16*6^n-40*5^n+44*4^n-26*3^n+8*2^n-1
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EXAMPLE
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a(8)=13963901
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MAPLE
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f:=n->16*6^n-40*5^n+44*4^n-26*3^n+8*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: A126628 A126629 A126630 this_sequence A126632 A126633 A126634
Sequence in context: A056329 A082677 A075608 this_sequence A046150 A124131 A000445
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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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