%I A100178
%S A100178 1,8,29,72,145,256,413,624,897,1240,1661,2168,2769,3472,4285,5216,6273,
%T A100178 7464,8797,10280,11921,13728,15709,17872,20225,22776,25533,28504,31697,
%U A100178 35120,38781,42688
%N A100178 Structured hexagonal diamond numbers (vertex structure 5).
%F A100178 a(n)=(1/6)*(8*n^3-6*n^2+4*n)
%Y A100178 Cf. A000578 = alternate vertex; A000447 = structured diamonds; A100145 
               for more on structured numbers.
%Y A100178 Sequence in context: A034167 A093809 A037157 this_sequence A106113 A028419 
               A046664
%Y A100178 Adjacent sequences: A100175 A100176 A100177 this_sequence A100179 A100180 
               A100181
%K A100178 easy,nonn
%O A100178 1,2
%A A100178 James A. Record (james.record(AT)gmail.com). Nov 07, 2004.