A252969 - cp's OEIS frontend

A252969 Number of n X n nonnegative integer arrays with upper left 0 and lower right n+n-5 and value increasing by 0 or 1 with every step right or down.

%I A252969 #10 Feb 07 2019 14:29:32
%S A252969 0,0,18,1236,46812,1592348,54926890,1988261908,75922639116,
%T A252969 3044977814280,127417950149256,5527784646050032,247288999212565632,
%U A252969 11357451257590359840,533618856431642996126,25573783371050570978268,1247199857452953231731592,61772272799794134860411162
%N A252969 Number of n X n nonnegative integer arrays with upper left 0 and lower right n+n-5 and value increasing by 0 or 1 with every step right or down.
%Y A252969 Diagonal of A252976.
%K A252969 nonn
%O A252969 1,3
%A A252969 _R. H. Hardin_, Dec 25 2014
%E A252969 a(16)-a(18) from _Alois P. Heinz_, Feb 07 2019

cp's OEIS Frontend

A252969 Number of n X n nonnegative integer arrays with upper left 0 and lower right n+n-5 and value increasing by 0 or 1 with every step right or down.