%I A099721
%S A099721 0,3,20,63,144,275,468,735,1088,1539,2100,2783,3600,4563,5684,6975,8448,
%T A099721 10115,11988,14079,16400,18963,21780,24863,28224,31875,35828,40095,
%U A099721 44688,49619,54900,60543,66560,72963,79764,86975,94608,102675,111188
%N A099721 2n^3+n^2.
%p A099721 a:=n->sum(sum(j+k+n, j=1..n),k=1..n): seq(a(n), n=0..38); - Zerinvary 
               Lajos (zerinvarylajos(AT)yahoo.com), Jun 02 2007
%p A099721 a:=n->add(n+add(n+add(1, j=1..n),j=1..n),j=1..n):seq(a(n), n=0..21); 
               [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Aug 27 2008]
%t A099721 a[n_]:=2*n^3+n^2;...and/or...Array[ #*(#*(2*#+1))&,5!,0] [From Vladimir 
               Orlovsky (4vladimir(AT)gmail.com), Dec 21 2008]
%Y A099721 Cf. A000578 A066023 A001093 A034262 A071568 A011379 A027444 A053698 A033431 
               A033562 A061317 A098547.
%Y A099721 Sequence in context: A143582 A132404 A062359 this_sequence A024402 A067600 
               A160456
%Y A099721 Adjacent sequences: A099718 A099719 A099720 this_sequence A099722 A099723 
               A099724
%K A099721 nonn
%O A099721 0,2
%A A099721 Douglas Winston (douglas.winston(AT)srupc.com), Nov 07 2004