|
| |
|
|
A086025
|
|
a(n) = Sum_(i=1..n) C(i+4,5)^2.
|
|
23
| |
|
|
1, 37, 478, 3614, 19490, 82994, 296438, 923702, 2580071, 6588075, 15606084, 34685508, 72976852, 146387476, 281597860, 521971876, 936053677, 1629533233, 2761788434, 4568378450, 7391175350, 11718183750, 18235516650, 27894475050
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,2
|
|
|
FORMULA
| G.f.: x*(1+x)*(x^4+24*x^3+76*x^2+24*x+1)/(x-1)^12. a(n) = n*(2*n+5)*(n+5)*(n+4)*(n+3)*(n+2)*(n+1)*(63*n^4+630*n^3+1855*n^2+ 1400*n+12) / 19958400. [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jun 16 2010]
|
|
|
CROSSREFS
| Cf. A087127, A024166, A085438, A085439, A085440, A085441, A085442, A086020, A086021, A086022, A086023, A086024, A086026, A086027, A086028, A086029, A086030.
Sequence in context: A142567 A142286 A166132 * A197215 A197240 A142764
Adjacent sequences: A086022 A086023 A086024 * A086026 A086027 A086028
|
|
|
KEYWORD
| easy,nonn
|
|
|
AUTHOR
| Andre F. Labossiere (boronali(AT)laposte.net), Jul 11 2003
|
|
|
EXTENSIONS
| More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jun 16 2010
|
| |
|
|
