OFFSET
0,20
LINKS
Alois P. Heinz, Table of n, a(n) for n = 0..10000
FORMULA
a(10*n+k) = Sum_{j=0..k} (-1)^j * C(k,j) * a(n+k-j) for k=0..9.
MAPLE
a:= proc(n) option remember; local m, q;
m:= irem(n, 10, 'q'); `if`(n<10, `if`(n=9, 1, 0),
add(a(q+m-j)*(-1)^j*binomial(m, j), j=0..m))
end:
seq(a(n), n=0..100);
CROSSREFS
KEYWORD
AUTHOR
Alois P. Heinz, Sep 27 2013
STATUS
approved