# A133577 (b-file synthesized from sequence entry) 0 1 1 2 2 12 3 32 4 152 5 472 6 1992 7 6712 8 26632 9 93752 10 360072 11 1297592 12 4898312 13 17874232 14 66857352 15 245599672 16 914173192 17 3370169912 18 12511901832 19 46213600952 20 171332619272 21 633468628792 22 2346794821512 23 8681481109432