# A003873 (b-file synthesized from sequence entry) 1 1 2 1 3 8 4 8 5 27 6 27 7 28 8 28 9 42 10 42 11 42 12 48 13 48 14 56 15 56 16 70 17 84 18 84 19 105 20 105 21 120 22 120 23 162 24 162 25 168 26 168 27 189 28 189 29 216 30 216