# A108506 (b-file synthesized from sequence entry) 1 2 2 3 3 4 4 8 5 20 6 38 7 95 8 248 9 263 10 303 11 304 12 410 13 438 14 548 15 688 16 1074 17 1575 18 8364 19 9910 20 15910 21 37344