# A003865 (b-file synthesized from sequence entry) 1 1 2 9 3 35 4 36 5 42 6 75 7 84 8 90 9 126 10 160 11 210 12 224 13 224 14 225 15 252 16 288 17 300 18 315 19 350 20 384 21 384 22 450 23 525 24 567