%I #20 Oct 01 2022 19:41:03
%S 1,3,1,7,1,3,1,15,1,3,1,7,1,3,1,31,1,3,1,7,1,3,1,15,1,3,1,49,1,3,1,63,
%T 1,3,1,7,1,3,1,15,1,3,1,7,1,3,1,31,1,3,1,8,1,9,1,11,1,5,1,5,1,111,1,
%U 127,1,3,1,7,1,3,1,15,1,3,1,21,1,3,1,31,1,3
%N Diagonal of Sprague-Grundy values for n X m 2D Toppling Dominoes L's.
%C 2D Toppling Dominoes is played in the same manner as conventional Toppling Dominoes, with the addition of toppling in the north and south directions. An n X m L is defined as a column of n dominoes and a row of m dominoes intersecting at an endpoint for both row and column. An n X m L comprises n+m-1 dominoes.
%C It is known that alternate terms are 1.
%H Ian C Haile, <a href="https://github.com/IanHaile/2D_Toppling_Dominoes">Python program</a>
%Y Main diagonal of A354586 viewed as square array.
%K easy,nonn
%O 1,2
%A _Ian C Haile_, Aug 18 2022