|
Search: id:A008859
|
|
| |
|
| 1, 2, 4, 8, 16, 32, 64, 127, 247, 466, 848, 1486, 2510, 4096, 6476, 9949, 14893, 21778, 31180, 43796, 60460, 82160, 110056, 145499, 190051, 245506, 313912, 397594, 499178, 621616, 768212, 942649, 1149017, 1391842, 1676116, 2007328
(list; graph; listen)
|
|
|
OFFSET
|
0,2
|
|
|
REFERENCES
|
L. Comtet, Advanced Combinatorics, Reidel, 1974, p. 72, Problem 2.
|
|
FORMULA
|
a(n)=sum(binomial(n+1, 2k), k=0..3). - Len Smiley (smiley(AT)math.uaa.alaska.edu), Oct 20 2001
O.g.f.: -(1-5*x+11*x^2-13*x^3+9*x^4-3*x^5+x^6)/(-1+x)^7. - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Apr 02 2008
|
|
CROSSREFS
|
Cf. A008860, A008861, A008862, A008863, A006261, A000127.
Sequence in context: A069050 A059174 A054044 this_sequence A145113 A062257 A062258
Adjacent sequences: A008856 A008857 A008858 this_sequence A008860 A008861 A008862
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
N. J. A. Sloane (njas(AT)research.att.com) and R. K. Guy
|
|
|
Search completed in 0.002 seconds
|
