%I A027656
%S A027656 1,0,2,0,3,0,4,0,5,0,6,0,7,0,8,0,9,0,10,0,11,0,12,0,13,0,14,0,15,0,16,
%T A027656 0,17,0,18,0,19,0,20,0,21,0,22,0,23,0,24,0,25,0,26,0,27,0,28,0,29,0,30,
%U A027656 0,31,0,32,0,33,0,34,0,35,0,36,0,37,0,38,0,39,0,40,0,41,0,42,0,43,0
%N A027656 Expansion of 1/(1-x^2)^2 (included only for completeness - my policy 
               is always to omit the zeros from such sequences).
%C A027656 a(n) = (n+2)(n+3)/2 mod n+2. - Amarnath Murthy (amarnath_murthy(AT)yahoo.com), 
               Jun 17 2004
%F A027656 Binomial transform is A045891. Partial sums are A008805. The sequence 
               0, 1, 0, 2, ... has a(n)=floor((n+2)/2)(1-(-1)^n)/2. - Paul Barry 
               (pbarry(AT)wit.ie), May 27 2003
%F A027656 a(n)=floor((n+3)/2)(1+(-1)^n)/2 - Paul Barry (pbarry(AT)wit.ie), May 
               27 2003
%F A027656 a(n)={[1+(-1)^n]/4}*Sum_{k=0..n}{1+(-1)^k} - Paolo P. Lava (ppl(AT)spl.at), 
               Nov 30 2007
%Y A027656 Cf. A142150. [From Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), 
               Nov 05 2009]
%Y A027656 Sequence in context: A108416 A108760 A137304 this_sequence A142150 A034948 
               A135472
%Y A027656 Adjacent sequences: A027653 A027654 A027655 this_sequence A027657 A027658 
               A027659
%K A027656 nonn
%O A027656 0,3
%A A027656 N. J. A. Sloane (njas(AT)research.att.com).