# A218008 (b-file synthesized from sequence entry) 0 0 1 0 2 2 3 4 4 10 5 18 6 38 7 68 8 138 9 250 10 502 11 922 12 1846 13 3430 14 6862 15 12868 16 25738 17 48618 18 97238 19 184754 20 369510 21 705430 22 1410862 23 2704154 24 5408310 25 10400598 26 20801198 27 40116598 28 80233198 29 155117518 30 310235038