1,2

a(n)=(1/6)*(7*n^3-3*n^2+8*n)

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

Sequence in context: A134747 A083013 A028553 this_sequence A119515 A153976 A105636

Adjacent sequences: A100179 A100180 A100181 this_sequence A100183 A100184 A100185

easy,nonn

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