%I #10 Feb 08 2023 10:10:58
%S 1,-3,3,0,-5,5,0,0,-7,7,0,0,0,-9,9,0,0,0,0,-11,11,0,0,0,0,0,-13,13,0,
%T 0,0,0,0,0,-15,15,0,0,0,0,0,0,0,-17,17,0,0,0,0,0,0,0,0,-19,19,0,0,0,0,
%U 0,0,0,0,0,-21,21,0,0,0,0,0,0,0,0,0,0,-23,23
%N Triangle read by rows: inverse of the lower triangular matrix (1/1; 1/1, 1/3; 1/1, 1/3, 1/5; ...).
%C A version of an odd number transform.
%F Triangle read by rows, replace the right border (1, 2, 3, ...) of A126615 with (1, 3, 5, ...) and the adjacent diagonal (-2, -3, -4, ...) with (-3, -5, -7, ...).
%e First few rows of the triangle:
%e 1;
%e -3, 3;
%e 0, -5, 5;
%e 0, 0, -7, 7;
%e ...
%o (PARI) tabl(nn) = 1/matrix(nn,nn,i,j,if(i>=j, 1/(2*j-1), 0));
%o lista(nn) = my(m=tabl(nn)); for (n=1, nn, for (k=1, n, print1(m[n,k], ", "))); \\ _Michel Marcus_, Feb 08 2023
%Y Cf. A126615.
%K tabl,sign
%O 1,2
%A _Gary W. Adamson_, Feb 11 2007
%E Edited by _N. J. A. Sloane_, Feb 26 2007
%E More terms from _Michel Marcus_, Feb 08 2023
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