# A116457 (b-file synthesized from sequence entry) 1 1 2 3 3 5 4 7 5 11 6 17 7 29 8 53 9 107 10 257 11 733 12 2503 13 10211 14 49739 15 285377 16 1909561 17 14736529 18 129812899 19 1293238351 20 14448382721 21 179668662139 22 2470072307533 23 37316454626819