Search: id:A051263
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%I A051263
%S A051263 1,1,1,3,3,4,7,7,9,13,14,17,22,24,28,35,38,43,52,56,63,74,79,88,101,108,
%T A051263 119,134,143,156,174,185,200,221,234,252,276,291,312,339,357,381,411,
%U A051263 432,459,493,517,547,585,612,646,688,718,756,802,836,878,928,966
%N A051263 Expansion of 1/((1-x)*(1-x^3)^2*(1-x^5)).
%C A051263 A two-way infinite sequences which is palindromic (up to sign). - Michael 
               Somos, Mar 21, 2003
%H A051263 <a href="Sindx_Tu.html#2wis">Index entries for two-way infinite sequences</
               a>
%F A051263 G.f.: 1/((1-x)(1-x^3)^2(1-x^5)). a(-12-n)=-a(n). a(n)=a(n-1)+2a(n-3)-2a(n-4)+a(n-5)-2a(n-6)+a(n-7)-2a(n-8)+2a\
               (n-9)+a(n-11)-a(n-12).
%o A051263 (PARI) a(n)=if(n<-11,-a(-12-n),if(n<0,0,polcoeff(1/((1-x)*(1-x^3)^2*(1-x^5))+x*O(x^n),
               n)))
%Y A051263 Cf. A028288.
%Y A051263 Cf. A028288. A029153(n)=a(n\2-n%2)=a(A028242(n-2)).
%Y A051263 Sequence in context: A076619 A007448 A155689 this_sequence A058674 A152651 
               A091973
%Y A051263 Adjacent sequences: A051260 A051261 A051262 this_sequence A051264 A051265 
               A051266
%K A051263 nonn,easy
%O A051263 0,4
%A A051263 N. J. A. Sloane (njas(AT)research.att.com).

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