|
| |
|
|
A181478
|
|
a(n) has generating function 1/((1-x)^k*(1-x^2)^(k*(k-1)/2)) for k=6.
|
|
4
|
|
|
|
1, 6, 36, 146, 561, 1812, 5552, 15372, 40677, 100562, 239316, 541926, 1188341, 2507736, 5149056, 10251560, 19935135, 37790610, 70187260, 127580310, 227779695, 399218820, 688680720, 1169024220, 1956567795, 3228473430
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
0,2
|
|
|
LINKS
|
|
|
|
MATHEMATICA
|
CoefficientList[Series[1/(1-x)^6/(1-x^2)^15, {x, 0, 16}], x]; see also A181477.
|
|
|
CROSSREFS
|
|
|
|
KEYWORD
|
nonn,easy
|
|
|
AUTHOR
|
|
|
|
STATUS
|
approved
|
| |
|
|
