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A131871
A131766/18.
0
0, 0, 0, 0, 0, 1, 2, 3, 4, 10, 21, 32, 43, 54, 165, 276, 387, 498, 1109, 2220, 3331, 4442, 5553, 16664, 27775, 38886, 49997, 111108, 222219, 333330, 444441, 555552, 666663
OFFSET
0,7
CROSSREFS
Sequence in context: A135056 A132135 A372933 * A132446 A332838 A123700
KEYWORD
nonn
AUTHOR
Paul Curtz, Oct 05 2007
STATUS
approved