# A019148 (b-file synthesized from sequence entry) 3 0 4 0 5 4 6 5 7 9 8 26 9 47 10 120 11 309 12 612 13 1449 14 3708 15 8653 16 20721 17 53261 18 133949 19 333428 20 865874 21 2254196 22 5819271 23 15294876 24 40448411 25 106628317 26 282842205 27 753174274 28 2004759492 29 5347626549 30 14291732370