# A235701 (b-file synthesized from sequence entry) 0 1 1 2 2 4 3 8 4 16 5 32 6 64 7 126 8 252 9 490 10 980 11 1890 12 3780 13 7252 14 14504 15 27734 16 55468 17 105840 18 211680 19 403368 20 806736 21 1535954 22 3071908 23 5845406 24 11690812 25 22238062 26 44476124 27 84582428 28 169164856 29 321661970 30 643323940 31 1223146232 32 2446292464 33 4650833040