0,2

C(n)*(6n-2), where C(n) are the Catalan numbers (A000108). - Ralf Stephan (ralf(AT)ark.in-berlin.de), Aug 24 2003

Twice A051960.

Adjacent sequences: A028280 A028281 A028282 this_sequence A028284 A028285 A028286

Sequence in context: A033297 A129880 A137954 this_sequence A110145 A052366 A052367

nonn

Mohammad K. Azarian (ma3(AT)evansville.edu)

More terms from James A. Sellers (sellersj(AT)math.psu.edu)