%I
%S 0,1,1,1,2,3,2,1,1,4,5,7,8,7,3,16,11,4,4,11,14,61,77,88,92,
%T 88,77,63,272,211,134,46,46,134,211,274
%N A Seidel matrix a(n,k) read by antidiagonals downwards.
%C The first row is a signed version of the Euler numbers A000111.
%C Other rows are defined by a(n+1,k) = a(n,k)+a(n,k+1).
%H A. Randrianarivony and J. Zeng, <a href="http://dx.doi.org/10.1006/aama.1996.0001">Une famille de polynomes qui interpole plusieurs suites...</a>, Adv. Appl. Math. 17 (1996), 126. See Section 6.
%e The first few antidiagonals are:
%e 0,
%e 1,1,
%e 1,2,3,
%e 2,1,1,4,
%e 5,7,8,7,3,
%e 16,11,4,4,11,14,
%e 61,77,88,92,88,77,63,
%e 272,211,134,46,46,134,211,274,
%e ...
%e For the array itself, see the Randrianarivony and Zeng (1996) article.
%Y Cf. A000111, A000657 (nexttomain diagonal), A323833.
%K sign,tabl,more
%O 0,5
%A _N. J. A. Sloane_, Feb 03 2019
