0,2

f := n->(5*n)!/((3*n)!*n!*n!);

Sequence in context: A042745 A158912 A036067 this_sequence A093598 A153469 A160253

Adjacent sequences: A001448 A001449 A001450 this_sequence A001452 A001453 A001454

nonn

N. J. A. Sloane (njas(AT)research.att.com).