# A373124 (b-file synthesized from sequence entry) 0 1 1 2 2 7 3 11 4 45 5 105 6 325 7 989 8 3268 9 10125 10 33017 11 111435 12 369576 13 1277044 14 4362878 15 15233325 16 53647473 17 189461874 18 676856245 19 2422723580 20 8743378141 21 31684991912 22 115347765988 23 421763257890 24 1548503690949 25 5702720842940 26 21074884894536 27 78123777847065