%I A119713
%S A119713 0,2,7,12,21,30,39,53,67,81,95,115,135,155,175,195,222,249,276,303,330,
%T A119713 357,392,427,462,497,532,567,602,646,690,734,778,822,866,910,954,1008,
%U A119713 1062,1116,1170,1224,1278,1332,1386,1440,1505,1570,1635,1700,1765,1830
%N A119713 First differences are 2, 5, 5, 9, 9, 9, 14, 14, 14, 14, ..., that is, 
               A000096 with m-th term repeated m times (m>=1).
%D A119713 David Pagni, Building buildings with triangular numbers, AMATYC Review 
               (vol. 27 no. 2 spring 2006, pp. 56-65).
%t A119713 a = 10; lst = {0}; s = 0; t = Flatten@ Table[ Table[n*(n + 3)/2, {n}], 
               {n, a}]; Do[ AppendTo[lst, s = s + t[[n]]], {n, a(a+1)/2}]; lst - 
               Robert G. Wilson v (rgwv(at)rgwv.com), Jun 16 2006
%Y A119713 Sequence in context: A133459 A023669 A137401 this_sequence A135541 A122264 
               A079824
%Y A119713 Adjacent sequences: A119710 A119711 A119712 this_sequence A119714 A119715 
               A119716
%K A119713 nonn
%O A119713 0,2
%A A119713 N. J. A. Sloane (njas(AT)research.att.com), Jun 13 2006
%E A119713 More terms from Robert G. Wilson v (rgwv(at)rgwv.com), Jun 16 2006