|
| |
|
|
A036910
|
|
(binomial(4*n,2*n)+binomial(2*n,n)^2)/2.
|
|
2
| |
|
|
1, 5, 53, 662, 8885, 124130, 1778966, 25947612, 383358645, 5719519850, 85990654178, 1300866635172, 19780031677718, 302045506654052, 4629016098160220, 71163013287905912, 1096960888092571317, 16949379732631632570, 262435310495071434602
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 0,2
|
|
|
REFERENCES
| The right-hand side of a binomial coefficient identity in H. W. Gould, Combinatorial Identities, Morgantown, 1972; Eq 3.68 page 30.
|
|
|
FORMULA
| a(n)=sum{k=0..n, (binomial(2n, k))^2 } - Paul Barry (pbarry(AT)wit.ie), May 15 2003
|
|
|
CROSSREFS
| Sequence in context: A065534 A186206 A123788 * A036916 A118583 A090360
Adjacent sequences: A036907 A036908 A036909 * A036911 A036912 A036913
|
|
|
KEYWORD
| nonn
|
|
|
AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
|
| |
|
|
