|
Search: id:A126628
|
|
|
| A126628 |
|
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. |
|
+0
1
|
|
| 8, 62, 470, 3506, 25718, 184682, 1294910, 8867186, 59423078, 390804602, 2529567950, 16157024066, 102070798838, 639011269322, 3970835898590, 24524390352146, 150705922308998, 922285972770842, 5624983337550830
(list; graph; listen)
|
|
|
OFFSET
|
1,1
|
|
|
LINKS
|
Milan Janjic, Enumerative Formulas for Some Functions on Finite Sets
|
|
FORMULA
|
a(n)=10*6^n-25*5^n+30*4^n-20*3^n+7*2^n-1
|
|
EXAMPLE
|
a(8)=8867186
|
|
MAPLE
|
f:=n->10*6^n-25*5^n+30*4^n-20*3^n+7*2^n-1;
|
|
CROSSREFS
|
Cf. A125630, A125948, A125947, A125946, A125945, A125910, A125909, A125908, A125880, A125897, A125904, A125858.
Sequence in context: A056054 A167251 A144143 this_sequence A085353 A125396 A163444
Adjacent sequences: A126625 A126626 A126627 this_sequence A126629 A126630 A126631
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Aleksandar M. Janjic and Milan R. Janjic (agnus(AT)blic.net), Feb 08 2007
|
|
|
Search completed in 0.002 seconds
|
