|
| |
|
|
A051746
|
|
a(n)=1/120*n*(n+7)*(n+1)*(n^2+2*n+12).
|
|
1
| |
|
|
2, 9, 27, 66, 141, 273, 490, 828, 1332, 2057, 3069, 4446, 6279, 8673, 11748, 15640, 20502, 26505, 33839, 42714, 53361, 66033, 81006, 98580, 119080, 142857, 170289, 201782, 237771, 278721, 325128, 377520, 436458, 502537, 576387, 658674, 750101
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,1
|
|
|
LINKS
| Vincenzo Librandi, Table of n, a(n) for n = 1..1000
|
|
|
FORMULA
| a(n)=binomial(n+4, n-1)+binomial(n+1, n-1)
|
|
|
MATHEMATICA
| Table[1/120*n*(n + 7)*(n + 1)*(n^2 + 2*n + 12), {n, 60}] (* From Vladimir Joseph Stephan Orlovsky, Jun 14 2011 *)
|
|
|
PROG
| (PARI) a(n)=((((n+10)*n+35)*n+110)*n+84)*n/120 \\ Charles R Greathouse IV, Jun 14 2011
(MAGMA) [1/120*n*(n+7)*(n+1)*(n^2+2*n+12): n in [1..50]]; // Vincenzo Librandi, Jun 15 2011
|
|
|
CROSSREFS
| Sequence in context: A125670 A008910 A153977 * A123904 A128239 A019065
Adjacent sequences: A051743 A051744 A051745 * A051747 A051748 A051749
|
|
|
KEYWORD
| easy,nonn
|
|
|
AUTHOR
| Klaus Strassburger (strass(AT)ddfi.uni-duesseldorf.de), Dec 07 1999
|
| |
|
|
