|
| |
|
|
A027933
|
|
T(n,2n-10), T given by A027926.
|
|
1
| |
|
|
1, 2, 5, 13, 34, 89, 232, 596, 1490, 3588, 8273, 18228, 38403, 77533, 150438, 281403, 509015, 892926, 1523117, 2532359, 4112704, 6536993, 10186540, 15586342, 23449376, 34731776, 50700937, 73018870, 103843433, 145950389
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 5,2
|
|
|
FORMULA
| a(n)=sum(binomial(n-k, 10-2k), k=0..5). - Len Smiley (smiley(AT)math.uaa.alaska.edu), Oct 20 2001
Conjecture: a(n) = 34 -9161*n/280 -101897*n^3/20160 +794293*n^2/50400 -287*n^5/1280 +438209*n^4/362880 +5593*n^6/172800 -47*n^7/13440 -n^9/80640 +n^8/3780 +n^10/3628800. [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Oct 05 2009]
|
|
|
CROSSREFS
| Sequence in context: A027931 A103142 A112844 * A141448 A011783 A001519
Adjacent sequences: A027930 A027931 A027932 * A027934 A027935 A027936
|
|
|
KEYWORD
| nonn
|
|
|
AUTHOR
| Clark Kimberling (ck6(AT)evansville.edu)
|
| |
|
|
