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 A155091 Triangle read by rows. Signed version of A145362. Main diagonal positive, rest of the nonzero terms negative. 1

%I

%S 1,-1,1,0,-1,1,0,-1,-1,1,0,0,-1,-1,1,0,0,-1,-1,-1,1,0,0,0,-1,-1,-1,1,

%T 0,0,0,-1,-1,-1,-1,1,0,0,0,0,-1,-1,-1,-1,1,0,0,0,0,-1,-1,-1,-1,-1,1,0,

%U 0,0,0,0,-1,-1,-1,-1,-1,1,0,0,0,0,0,-1,-1,-1,-1,-1,-1,1,0,0,0,0,0,0,-1,-1

%N Triangle read by rows. Signed version of A145362. Main diagonal positive, rest of the nonzero terms negative.

%C Matrix inverse of this triangle is A155092.

%e Table begins:

%e 1,

%e -1,1,

%e 0,-1,1,

%e 0,-1,-1,1,

%e 0,0,-1,-1,1,

%e 0,0,-1,-1,-1,1,

%e 0,0,0,-1,-1,-1,1,

%e 0,0,0,-1,-1,-1,-1,1,

%e 0,0,0,0,-1,-1,-1,-1,1,

%e 0,0,0,0,-1,-1,-1,-1,-1,1,

%Y Cf. A145362.

%K sign,tabl

%O 1,1

%A _Mats Granvik_, Jan 20 2009

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