# A305752 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 3 4 7 5 12 6 31 7 58 8 159 9 312 10 883 11 1774 12 5103 13 10368 14 30067 15 61414 16 178815 17 366168 18 1068259 19 2190190 20 6395919 21 13120944 22 38335123 23 78665590 24 229890591 25 471814344 26 1378985155 27 2830350526 28 8272839855 29 16980500640 30 49633834099 31 101878204486