# A284418 (b-file synthesized from sequence entry) 0 1 1 1 2 1 3 7 4 10 5 31 6 69 7 196 8 451 9 1168 10 2813 11 7119 12 17618 13 44206 14 111399 15 277972 16 709411 17 1763795 18 4543873 19 11269489 20 29244239 21 72402587 22 188977618 23 467258134 24 1225383748 25 3026799348 26 7969173506 27 19669004793 28 51959167749 29 128161003199 30 339530403506