# A007499 (b-file synthesized from sequence entry) 1 2 2 3 3 4 4 12 5 20 6 55 7 127 8 371 9 1037 10 3249 11 10071 12 32913 13 108112 14 363618 15 1233938 16 4244102 17 14716095 18 51480027 19 181312939