# A097168 (b-file synthesized from sequence entry) 0 1 1 13 2 151 3 1693 4 18571 5 200473 6 2137591 7 22571653 8 236478211 9 2461637233 10 25488068431 11 262725949213 12 2697866876251 13 27614135219593 14 281860550309671 15 2870078286120373 16 29164037908416691 17 295809674509083553