# A072247 (b-file synthesized from sequence entry) 2 1 3 3 4 8 5 4 6 20 7 30 8 5 9 48 10 144 11 75 12 6 13 112 14 560 15 595 16 154 17 7 18 256 19 1920 20 3440 21 1848 22 280 23 8 24 576 25 6048 26 16380 27 14994 28 4788 29 468 30 9 31 1280 32 17920 33 68320 34 95200 35 52290 36 10920 37 735 38 10 39 2816 40 50688 41 258720 42 510048 43 429198 44 155496 45 22638 46 1100 47 11