# A141351 (b-file synthesized from sequence entry) 0 1 1 2 2 3 3 6 4 15 5 43 6 133 7 430 8 1431 9 4863 10 16797 11 58787 12 208013 13 742901 14 2674441 15 9694846 16 35357671 17 129644791 18 477638701 19 1767263191 20 6564120421 21 24466267021 22 91482563641 23 343059613651 24 1289904147325 25 4861946401453 26 18367353072153 27 69533550916005