1,2
a(n)=(1/6)*(165*n^3-225*n^2+66*n)
Cf. A100170 = alternate vertex; A100145 for more on structured numbers.
Adjacent sequences: A100166 A100167 A100168 this_sequence A100170 A100171 A100172
Sequence in context: A044424 A044805 A063326 this_sequence A100170 A107343 A064203
easy,nonn
James A. Record (james.record(AT)gmail.com). Nov 07, 2004.
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