# A018744 (b-file synthesized from sequence entry) 1 1 2 2 3 3 4 4 5 5 6 6 7 8 8 10 9 12 10 15 11 16 12 20 13 24 14 30 15 32 16 40 17 48 18 60 19 64 20 80 21 96 22 120 23 160 24 192 25 240 26 320 27 480 28 960