Search: id:A131738
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%I A131738
%S A131738 0,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,
               27,
%T A131738 28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,
               51,
%U A131738 52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,
               75
%V A131738 0,-2,3,-4,5,-6,7,-8,9,-10,11,-12,13,-14,15,-16,17,-18,19,-20,21,-22,23,
               -24,25,-26,27,
%W A131738 -28,29,-30,31,-32,33,-34,35,-36,37,-38,39,-40,41,-42,43,-44,45,-46,47,
               -48,49,-50,51,
%X A131738 -52,53,-54,55,-56,57,-58,59,-60,61,-62,63,-64,65,-66,67,-68,69,-70,71,
               -72,73,-74,75
%N A131738 a(0) = 0. a(n) = (n+1)*(-1)^n, n>0 .
%C A131738 Also the main diagonal of A138057.
%Y A131738 Cf. A105811.
%Y A131738 Sequence in context: A099570 A020725 A119972 this_sequence A000027 A001477 
               A087156
%Y A131738 Adjacent sequences: A131735 A131736 A131737 this_sequence A131739 A131740 
               A131741
%K A131738 sign
%O A131738 0,2
%A A131738 Paul Curtz (bpcrtz(AT)free.fr), Sep 19 2007
%E A131738 Edited by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jul 07 2008

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