# A122636 (b-file synthesized from sequence entry) 1 2 2 4 3 8 4 10 5 17 6 40 7 71 8 174 9 416 10 1024 11 2714 12 7026 13 17864 14 55584 15 160298 16 415030 17 1675454 18 4421056 19 12669455 20 64706146 21 173347946 22 460825600 23 1205935387 24 5791248030 25 19093815077 26 50365299040 27 315389650247 28 840487488658 29 2556719681417 30 19838450374264 31 53848520341037