# A027222 (b-file synthesized from sequence entry) 0 1 1 1 2 3 3 4 4 11 5 17 6 44 7 74 8 184 9 327 10 790 11 1461 12 3452 13 6584 14 15278 15 29879 16 68290 17 136391 18 318035 19 625731 20 1487661 21 2883357 22 6971222 23 13338421 24 32727472 25 61920497 26 153926409 27 288368511 28 725264305 29 1351124510 30 3423262180