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A071405
(1/2)*(Sum_{k=0..p} C(p,k)*C(p+k,k)) - 2^p -1 )/p^2 where p runs through the primes.
0
1, 3, 33, 495, 186135, 4171377, 2466841857, 63503364807, 45502121922063, 1000280542916542065, 28769246281107682239, 725108164366019776175793, 647570641899231298169462337, 19531524543125261885413183191
OFFSET
1,2
CROSSREFS
Cf. A001850.
Sequence in context: A365028 A368442 A264833 * A234526 A243251 A336539
KEYWORD
nonn
AUTHOR
Benoit Cloitre, Feb 13 2003
STATUS
approved