A159756 - OEIS

%I #3 Sep 08 2013 13:31:39

%S 0,1,-1,4,-1,-2,12,0,-3,-3,32,4,-4,-5,-4,80,16,-4,-8,-7,-5,192,48,0,

%T -12,-12,-9,-6,448,128,16,-16,-20,-16,-11,-7,1024,320,64,-16,-32,-28,

%U -20,-13,-8,2304,768,192,0,-48,-48,-36,-24,-15,-9

%N Triangle A159755 reversed .

%F Sum_{k=0..n} T(n,k) = A045618(n-2) for n>=2 . T(2n,n)=-A001787(n).

%e Triangle begins : 0 ; 1,-1 ; 4,-1,-2 ; 12,0,-3,-3 ; 32,4,-4,-5,-4 ; ...

%Y Cf. A062111, A152920

%K sign,tabl

%O 0,4

%A _Philippe Deléham_, Apr 21 2009