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Triangle of C. A. Laisant for k<=0 (see A062111 and A152920).
1

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

%S 0,-1,1,-2,-1,4,-3,-3,0,12,-4,-5,-4,4,32,-5,-7,-8,-4,16,80,-6,-9,-12,

%T -12,0,48,192,-7,-11,-16,-20,-16,16,128,448,-8,-13,-20,-28,-32,-16,64,

%U 320,1024,-9,-15,-24,-36,-48,-48,0,192,768,2304

%N Triangle of C. A. Laisant for k<=0 (see A062111 and A152920).

%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 ; -2,-1,4 ; -3,-3,0,12 ; -4,-5,-4,4,32 ; ...

%K sign,tabl

%O 0,4

%A _Philippe Deléham_, Apr 21 2009