# A252745 (b-file synthesized from sequence entry) 0 0 1 0 2 1 3 3 4 6 5 15 6 26 7 57 8 118 9 237 10 486 11 989 12 1992 13 3997 14 8038 15 16133 16 32331 17 64777 18 129810 19 260191 20 521325 21 1043924 22 2089305 23 4180716