OFFSET
1,11
FORMULA
O(n, k) = E(n-k, k)+E(n-k, k+1)+...+E(n-k, n-k), for 2<=2k<=n, E given by A027186.
EXAMPLE
1,
0, 1,
1, 0, 1,
1, 0, 0, 1,
3, 0, 0, 0, 1,
3, 1, 0, 0, 0, 1,
6, 1, 0, 0, 0, 0, 1,
7, 2, 0, 0, 0, 0, 0, 1,
12, 2, 1, 0, 0, 0, 0, 0, 1,
14, 4, 1, 0, 0, 0, 0, 0, 0, 1,
22, 4, 2, 0, 0, 0, 0, 0, 0, 0, 1,
27, 6, 2, 1, 0, 0, 0, 0, 0, 0, 0, 1,
40, 7, 3, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1,
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
STATUS
approved