Search: id:A049598
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%I A049598
%S A049598 0,12,36,72,120,180,252,336,432,540,660,792,936,1092,1260,1440,1632,
%T A049598 1836,2052,2280,2520,2772,3036,3312,3600,3900,4212,4536,4872,5220,5580,
%U A049598 5952,6336,6732,7140,7560,7992,8436,8892,9360,9840,10332,10836,11352
%N A049598 12 times triangular numbers.
%C A049598 Except for the first term, a(n)=12*n+a(n-1), (with a(1)=12) [From Vincenzo 
               Librandi (vincenzo.librandi(AT)tin.it), Oct 24 2009]
%F A049598 a(n) = 6*n*(n+1). G.f.: A(x) = 12*x/(1-x)^3.
%F A049598 a(n) = A000217(n)*12. [From Omar E. Pol (info(AT)polprimos.com), Dec 
               11 2008]
%F A049598 a(n)=12*n+a(n-1)-12 (with a(1)=0) [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), 
               Nov 12 2009]
%e A049598 For n=2, a(2)=12*2+0-12=12; n=3, a(3)=12*3+12-12=36; n=4, a(4)=12*4+36-12=72 
               [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Nov 12 2009]
%t A049598 s=0;lst={s};Do[s+=n++ +12;AppendTo[lst, s], {n, 0, 8!, 12}];lst [From 
               Vladimir Orlovsky (4vladimir(AT)gmail.com), Nov 19 2008]
%Y A049598 Cf. A003154, A027468, A035008.
%Y A049598 Cf. A000217. [From Omar E. Pol (info(AT)polprimos.com), Dec 11 2008]
%Y A049598 Sequence in context: A073762 A043140 A043920 this_sequence A152135 A080562 
               A033196
%Y A049598 Adjacent sequences: A049595 A049596 A049597 this_sequence A049599 A049600 
               A049601
%K A049598 nonn,easy,new
%O A049598 0,2
%A A049598 Joe Keane (jgk(AT)jgk.org)
%E A049598 More terms from Robert Lozyniak (11(AT)onna.com) and Sarah Gilchrist 
               (s1162763(AT)cedarville.edu)

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