# A049432 (b-file synthesized from sequence entry) 1 2 2 3 3 4 4 5 5 6 6 8 7 13 8 20 9 24 10 46 11 59 12 150 13 152 14 198 15 683 16 880 17 1135 18 1907 19 6617 20 10243