# A149209 (b-file synthesized from sequence entry) 0 1 1 1 2 4 3 10 4 40 5 134 6 527 7 1950 8 7904 9 30491 10 125199 11 498445 12 2067864 13 8381254 14 35053759 15 144098563 16 606147761 17 2516740364 18 10640646802 19 44529824218 20 189010047669 21 795948814046 22 3390234316109 23 14349091499960 24 61296338029127 25 260536427436212 26 1115820095516391 27 4759539900355647