Search: id:A055214
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%I A055214
%S A055214 1,1,3,17,135,1349,16187,226617,3625871,65265677,1305313539,
%T A055214 28716897857,689205548567,17919344262741,501741639356747,
%U A055214 15052249180702409,481671973782477087,16376847108604220957
%N A055214 a(n) = 2n*a(n-1) - 1.
%F A055214 a(n) = ceiling[2^n * n! * (2-sqrt(e))] = ceiling[A000165(n) * (2-sqrt(e))]
%e A055214 a(3) = 2*3*a(2)-1 = 6*3-1 = 17
%t A055214 s=-1;lst={Abs[s]};Do[s+=s++n;AppendTo[lst, Abs[s]], {n, 1, 5!, 2}];lst 
               [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Oct 23 2008]
%Y A055214 Sequence in context: A074524 A163684 A093986 this_sequence A105630 A006290 
               A060003
%Y A055214 Adjacent sequences: A055211 A055212 A055213 this_sequence A055215 A055216 
               A055217
%K A055214 easy,nonn
%O A055214 0,3
%A A055214 Henry Bottomley (se16(AT)btinternet.com), Jun 19 2000
%E A055214 More terms from James A. Sellers (sellersj(AT)math.psu.edu), Jul 04 2000

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