# A148439 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 6 4 15 5 43 6 143 7 447 8 1457 9 5153 10 17712 11 62226 12 228307 13 826403 14 3045356 15 11463886 16 42915761 17 163162575 18 626421084 19 2403106726 20 9332107293 21 36397643689 22 142264226087 23 560927157537 24 2216454163673 25 8789867068979 26 35060453041676 27 140072687401512 28 561842105897395 29 2261924959908545