# A198684 (b-file synthesized from sequence entry) 1 2 2 3 3 6 4 15 5 16 6 30 7 41 8 52 9 62 10 93 11 110 12 126 13 142 14 174 15 200 16 232 17 256 18 299 19 338 20 380 21 400 22 444 23 506 24 568 25 586 26 634 27 664