# A005630 (b-file synthesized from sequence entry) 1 0 2 0 3 0 4 0 5 0 6 0 7 4 8 10 9 34 10 96 11 284 12 782 13 2226 14 6208 15 17560 16 49618 17 141500 18 405104 19 1168316 20 3386538 21 9875232 22 28939944 23 85235762 24 252159572 25 749160544 26 2234378156 27 6688358338 28 20088296030 29 60524845158 30 182893018756