|
| |
| |
|
|
|
1, 4, 7, 10, 11, 14, 17, 18, 21, 24, 25, 28, 31, 32, 35, 38, 39, 42, 45, 46, 49, 52, 53, 56, 59, 60, 63, 66, 67, 70, 73, 74, 77, 80, 81, 84, 87, 88, 91, 94, 95, 98, 101, 102, 105, 108, 109, 112, 115, 116, 119, 122, 123, 126, 129, 130, 133, 136, 137, 140, 143, 144
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 0,2
|
|
|
FORMULA
| For n>0, a(n+3) = a(n) + 7.
|
|
|
EXAMPLE
| The first six palindromes are 1, 22, 232, 3223,22322, 232232.
|
|
|
MATHEMATICA
| CoefficientList[Series[(1+3x+3x^2+2x^3-2x^4)/((-1+x)^2(1+x+x^2)), {x, 0, 160}], x] (* From Vladimir Joseph Stephan Orlovsky, Jan 26 2012 *)
|
|
|
CROSSREFS
| Cf. A082204, A082205.
Cf. A047342. [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Sep 17 2008]
Sequence in context: A093465 A123869 A072125 * A115566 A190507 A087298
Adjacent sequences: A082203 A082204 A082205 * A082207 A082208 A082209
|
|
|
KEYWORD
| base,easy,nonn,less
|
|
|
AUTHOR
| Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Apr 10 2003
|
|
|
EXTENSIONS
| Edited by Don Reble (djr(AT)nk.ca), Mar 13 2006
|
| |
|
|
