# A113684 (b-file synthesized from sequence entry) 0 0 1 1 2 4 3 11 4 25 5 52 6 102 7 193 8 356 9 645 10 1153 11 2040 12 3580 13 6241 14 10820 15 18671 16 32089 17 54956 18 93826 19 159745 20 271300 21 459721 22 777409 23 1312176 24 2211000 25 3719617 26 6248452 27 10482323 28 17562841 29 29391460 30 49132638 31 82048705 32 136884260