# A320187 (b-file synthesized from sequence entry) 0 1 1 1 2 3 3 9 4 33 5 135 6 633 7 3207 8 17589 9 102627 10 636033 11 4161140 12 28680694 13 207317854 14 1567337840 15 12345045176 16 101012326346 17 856192424564 18 7501633169738 19 67811887289162 20 631523439500196 21 6051299254375782 22 59595920426107182 23 602637812152552784 24 6251230070001558400