|
Search: id:A036914
|
|
| |
|
| 1, 162, 303750, 995742720, 4202607543750, 20493770553668412, 109738295483524291584, 627433021349790289920000, 3765656995768668039930646470, 23460102529588600192836492187500, 150552597141762184641565143623272500, 989711604190467147276644388444241920000
(list; graph; listen)
|
|
|
OFFSET
|
0,2
|
|
|
REFERENCES
|
The right-hand side of a binomial coefficient identity in H. W. Gould, Combinatorial Identities, Morgantown, 1972; Eq 21.1 page 72.
|
|
FORMULA
|
Sum_{k=0..2*n} (-1)^k*C(3*n, k)^3*C(3*n-k, n)^3 = (-1)^n*C(2*n, n)*C(3*n, 2*n)^4.
|
|
CROSSREFS
|
Sequence in context: A128803 A035746 A022151 this_sequence A030442 A061574 A057604
Adjacent sequences: A036911 A036912 A036913 this_sequence A036915 A036916 A036917
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
N. J. A. Sloane (njas(AT)research.att.com).
|
|
|
Search completed in 0.002 seconds
|
