# A049309 (b-file synthesized from sequence entry) 1 1 2 1 3 2 4 2 5 3 6 4 7 8 8 20 9 20 10 30 11 88 12 94 13 214 14 457 15 596 16 1096 17 3280 18 5560 19 7316 20 21944 21 26272 22 49940