# A325875 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 3 4 7 5 13 6 20 7 38 8 69 9 129 10 222 11 407 12 726 13 1313 14 2318 15 4146 16 7432 17 13296 18 23759 19 42458 20 75714