# A048133 (b-file synthesized from sequence entry) 0 2 1 6 2 8 3 14 4 26 5 62 6 134 7 393 8 1257 9 4659 10 9314 11 27933 12 167073 13 334142 14 4677862 15 14033577 16 56134292 17 2133102298 18 11788191218 19 52541651594 20 536226160966 21 2681130804805 22 8512643845707 23 129535245187539