OFFSET
10,2
LINKS
Alois P. Heinz, Table of n, a(n) for n = 10..900
MAPLE
b:= proc(n, v) option remember; `if`(n=0, [1, 0$6],
add(`if`(v in [0, i], b(n-i, `if`(i<=n-i, i, -1)),
[0, b(n-i, `if`(i<=n-i, i, -1))[1..6][]]), i=1..n))
end:
a:= n-> b(n, 0)[7]:
seq(a(n), n=10..60);
CROSSREFS
KEYWORD
nonn
AUTHOR
Joerg Arndt and Alois P. Heinz, Jul 04 2014
STATUS
approved