|
Search: id:A156577
|
|
|
| A156577 |
|
a(2n+2)=10*a(2n+1), a(2n+1)=10*a(2n)-9^n*A000108(n), a(0)=1 . |
|
+0
2
|
|
| 1, 9, 90, 891, 8910, 88938, 889380, 8890155, 88901550, 888923646, 8889236460, 88889884542, 888898845420, 8888918303988, 88889183039880, 888889778505099, 8888897785050990, 88888916293698870, 888889162936988700
(list; graph; listen)
|
|
|
OFFSET
|
0,2
|
|
|
COMMENT
|
Hankel transform is 9^C(n+1,2).
|
|
FORMULA
|
a(n)=sum{k=0..n, A120730(n,k)*9^k}.
|
|
CROSSREFS
|
Cf. A000108, A156273, A001405, A151281, A151162, A151254, A156195, A156361, A156362, A156566
Sequence in context: A052386 A158609 A057092 this_sequence A052268 A155199 A147841
Adjacent sequences: A156574 A156575 A156576 this_sequence A156578 A156579 A156580
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Philippe DELEHAM (kolotoko(AT)wanadoo.fr), Feb 10 2009
|
|
|
Search completed in 0.002 seconds
|
