|
Search: id:A007291
|
|
|
| A007291 |
|
Series expansion for rectilinear polymers on square lattice.
(Formerly M4440)
|
|
+0
1
|
|
| 7, 63, 254, 710, 1605, 3157, 5628, 9324, 14595, 21835, 31482, 44018, 59969, 79905, 104440, 134232, 169983, 212439, 262390, 320670, 388157, 465773, 554484, 655300, 769275, 897507, 1041138, 1201354, 1379385
(list; graph; listen)
|
|
|
OFFSET
|
2,1
|
|
|
REFERENCES
|
V. B. Priezzhev, Series expansion for rectilinear polymers on the square lattice, J. Phys. A 12 (1979), 2131-2139.
|
|
FORMULA
|
G.f.: (7 + 28x + 9 x^2 ) / ( 1 - x )^5.
a(n)=n(n-1)(11n^2-13n+3)/6 - T. D. Noe (noe(AT)sspectra.com), Feb 09 2007
|
|
CROSSREFS
|
Adjacent sequences: A007288 A007289 A007290 this_sequence A007292 A007293 A007294
Sequence in context: A024089 A060005 A055066 this_sequence A055405 A100741 A043027
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Simon Plouffe (plouffe(AT)math.uqam.ca)
|
|
|
Search completed in 0.002 seconds
|
