|
| |
| |
|
|
|
1, 10, 82, 730, 6562, 59050, 531442, 4782970, 43046722, 387420490, 3486784402, 31381059610, 282429536482, 2541865828330, 22876792454962, 205891132094650, 1853020188851842, 16677181699666570, 150094635296999122
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 0,2
|
|
|
COMMENTS
| a(n)^3 is palindromic in base 9 (1,1331,1030301,1003003001,....)
|
|
|
LINKS
| P. De Geest, World!Of Numbers
|
|
|
FORMULA
| G.f.: (1-9x^2)/((1-x)(1-9x)); a(n)=sum{k=0..n, binomial(n, k)*0^(k(n-k))*9^k}.
a(n)=A062396(n), n>0. [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Aug 28 2008]
a(n)=9*a(n-1)-8, with a(1)=10. [From Vincenzo Librandi, Dec 29 2010]
|
|
|
CROSSREFS
| Cf. A046233.
Sequence in context: A154246 A037549 A199701 * A026954 A116879 A154340
Adjacent sequences: A103457 A103458 A103459 * A103461 A103462 A103463
|
|
|
KEYWORD
| easy,nonn
|
|
|
AUTHOR
| Paul Barry (pbarry(AT)wit.ie), Feb 07 2005
|
| |
|
|
