|
Search: id:A032092
|
|
|
| A032092 |
|
Number of reversible strings with n-1 beads of 2 colors. 5 beads are black. String is not palindromic. |
|
+0
3
|
|
| 3, 9, 28, 60, 126, 226, 396, 636, 1001, 1491, 2184, 3080, 4284, 5796, 7752, 10152, 13167, 16797, 21252, 26532, 32890, 40326, 49140, 59332, 71253, 84903, 100688, 118608, 139128, 162248, 188496, 217872, 250971, 287793
(list; graph; listen)
|
|
|
OFFSET
|
7,1
|
|
|
COMMENT
|
If the offset is changed to 3, this is the 2nd Witt transform of A000217 [Moree]. [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Nov 08 2008]
|
|
LINKS
|
C. G. Bower, Transforms (2)
Pieter Moree, The formal series Witt transform, Discr. Math. no. 295 vol. 1-3 (2005) 143-160. [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Nov 08 2008]
|
|
FORMULA
|
"BHK[ 6 ]" (reversible, identity, unlabeled, 6 parts) transform of 1, 1, 1, 1...
G.f.: x^7(3+x^2)/((1-x)^6*(1+x)^3). [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Nov 08 2008]
|
|
CROSSREFS
|
Sequence in context: A102558 A022767 A015638 this_sequence A026524 A022631 A027346
Adjacent sequences: A032089 A032090 A032091 this_sequence A032093 A032094 A032095
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Christian G. Bower (bowerc(AT)usa.net)
|
|
|
Search completed in 0.002 seconds
|
