|
Search: id:A126635
|
|
|
| A126635 |
|
a(n) is the number of nonnegative integers k less than 10^n such that the decimal representation of k lacks the digits 1,2,3, at least one of digits 4,5 and at least one of digits 6,7,8,9. |
|
+0
2
|
|
| 7, 47, 307, 1943, 11827, 69287, 392707, 2166743, 11703187, 62168327, 325983907, 1692105143, 8714154547, 44600020967, 227161443907, 1152585909143, 5830444893907, 29423488811207, 148206112628707, 745396075770743
(list; graph; listen)
|
|
|
OFFSET
|
1,1
|
|
|
LINKS
|
Milan Janjic, Enumerative Formulas for Some Functions on Finite Sets
|
|
FORMULA
|
a(n)=8*5^n-16*4^n+14*3^n-6*2^n+1
|
|
EXAMPLE
|
a(8)=2166743
|
|
MAPLE
|
f:=n->8*5^n-16*4^n+14*3^n-6*2^n+1;
|
|
CROSSREFS
|
Cf. A125630, A125948, A125947, A125946, A125945, A125910, A125909, A125908, A125880, A125897, A125904, A125858.
Sequence in context: A091516 A064385 A009260 this_sequence A085352 A125370 A126528
Adjacent sequences: A126632 A126633 A126634 this_sequence A126636 A126637 A126638
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Aleksandar M. Janjic and Milan R. Janjic (agnus(AT)blic.net), Feb 08 2007
|
|
|
Search completed in 0.002 seconds
|
