OFFSET
0,2
COMMENTS
LINKS
Alois P. Heinz, Table of n, a(n) for n = 0..100
Alois P. Heinz, Animation of a(3) = 119 paths
Alois P. Heinz, Plot of a(3) = 119 paths
Alois P. Heinz, Plot of a(4) = 1070 paths
Alois P. Heinz, Plot of a(5) = 10751 paths
MAPLE
b:= proc(x, y, t) option remember; `if`(x=0, 1, add(`if`(j=t, 0,
b(x-1, y+j, j)), j=max(t-1, -y)..min(x*(x-1)/2-y, t+1)))
end:
a:= n-> b(4*n+3, 0$2):
seq(a(n), n=0..23);
CROSSREFS
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Apr 01 2020
STATUS
approved