|
%I #5 Sep 29 2018 18:47:26
%S 1,1,1,0,1,1,0,1,1,1,0,0,0,1,1,0,0,0,1,1,1,0,0,0,0,0,1,1,0,0,0,0,0,1,
%T 1,1,0,0,0,0,0,0,0,1,1,0,0,0,0,0,0,0,1,1,1,0,0,0,0,0,0,0,0,0,1,1
%N Generalized (conditional) Riordan array with k-th column generated by x^k*(1+x) if k mod 2 = 0, x^k*(1+x+x^2) otherwise.
%C Row sums are A174296. A181654 is an eigentriangle.
%e Triangle begins
%e 1;
%e 1, 1;
%e 0, 1, 1;
%e 0, 1, 1, 1;
%e 0, 0, 0, 1, 1;
%e 0, 0, 0, 1, 1, 1;
%e 0, 0, 0, 0, 0, 1, 1;
%e 0, 0, 0, 0, 0, 1, 1, 1;
%e 0, 0, 0, 0, 0, 0, 0, 1, 1;
%e 0, 0, 0, 0, 0, 0, 0, 1, 1, 1;
%e 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1;
%e Production matrix begins
%e 1, 1;
%e -1, 0, 1;
%e 1, 1, 0, 1;
%e 0, -1, -1, 0, 1;
%e 0, 1, 1, 1, 0, 1;
%e 0, 0, 0, -1, -1, 0, 1;
%e 0, 0, 0, 1, 1, 1, 0, 1;
%e 0, 0, 0, 0, 0, -1, -1, 0, 1;
%e 0, 0, 0, 0, 0, 1, 1, 1, 0, 1;
%e 0, 0, 0, 0, 0, 0, 0, -1, -1, 0, 1;
%K easy,nonn,tabl
%O 0,1
%A _Paul Barry_, Nov 03 2010
|
