1,2

a(n)=(1/6)*(19*n^3-15*n^2+16*n)

Cf. A100185 - structured anti-prisms; A100145 for more on structured numbers.

Sequence in context: A016802 A102860 A136264 this_sequence A059165 A073718 A061449

Adjacent sequences: A100181 A100182 A100183 this_sequence A100185 A100186 A100187

easy,nonn

James A. Record (james.record(AT)gmail.com). Nov 07, 2004.