|
| |
| |
|
|
|
1, 9, 49, 249, 1249, 6249, 31249, 156249, 781249, 3906249, 19531249, 97656249, 488281249, 2441406249, 12207031249, 61035156249, 305175781249, 1525878906249, 7629394531249, 38146972656249, 190734863281249
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 0,2
|
|
|
COMMENTS
| Binomial transform of A081654. Inverse binomial transform of A081656.
|
|
|
FORMULA
| G.f.: (1+3x)/((1-5x)(1-x)) E.g.f. 2exp(5x)-exp(x)
a(n)=5*a(n-1)+4 with a(0)=1 [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Aug 01 2010]
|
|
|
EXAMPLE
| For n=1, a(1)=5*1+4=9; n=2, a(2)=5*9+4=49, n=3, a(3)=5*49+4=249 [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Aug 01 2010]
|
|
|
CROSSREFS
| Sequence in context: A080026 A060867 A192814 * A146798 A055428 A012231
Adjacent sequences: A081652 A081653 A081654 * A081656 A081657 A081658
|
|
|
KEYWORD
| easy,nonn
|
|
|
AUTHOR
| Paul Barry (pbarry(AT)wit.ie), Mar 26 2003
|
| |
|
|
