%I A056520
%S A056520 1,2,6,15,31,56,92,141,205,286,386,507,651,820,1016,1241,1497,1786,
%T A056520 2110,2471,2871,3312,3796,4325,4901,5526,6202,6931,7715,8556,9456,
%U A056520 10417,11441,12530,13686,14911,16207,17576,19020,20541,22141,23822
%N A056520 (n+2)*(2*n^2-n+3)/6
%C A056520 a(n) = A000330(n)+1.
%C A056520 Hankel transform of A030238. - Paul Barry (pbarry(AT)wit.ie), Oct 16 
               2007
%F A056520 a(n)=a(n-1)+n^2.
%p A056520 a:=n->sum ((j-n+1)^2,j=1..n): seq(a(n),n=2..43); - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), 
               Dec 17 2006
%t A056520 a[n_]:=(n+2)*(2*n^2-n+3)/6; ...and/or...a=1; lst={}; Do[a=n^2+a; AppendTo[lst, 
               a], {n, 0, 5!}]; lst [From Vladimir Orlovsky (4vladimir(AT)gmail.com), 
               Dec 17 2008]
%t A056520 s = 1; lst = {s}; Do[s += n^2; AppendTo[lst, s], {n, 1, 41, 1}]; lst 
               [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Jul 12 2009]
%Y A056520 Sequence in context: A098651 A087427 A141126 this_sequence A078406 A101352 
               A095380
%Y A056520 Adjacent sequences: A056517 A056518 A056519 this_sequence A056521 A056522 
               A056523
%K A056520 nonn
%O A056520 0,2
%A A056520 N. J. A. Sloane (njas(AT)research.att.com), Laura Kasavan (maui12129(AT)cswebmail.com), 
               Aug 26 2000