# A023920 (b-file synthesized from sequence entry) 0 1 1 0 2 0 3 0 4 18 5 0 6 0 7 72 8 0 9 240 10 252 11 0 12 0 13 504 14 0 15 0 16 1026 17 0 18 2160 19 1512 20 0 21 0 22 2664 23 0 24 0 25 3528 26 0 27 6720 28 5616 29 0 30 0 31 6552 32 0 33 0 34 9828 35 0 36 17520 37 11232 38 0 39 0 40 16380 41 0 42 0 43 17784 44 0 45 30240 46 24336 47 0 48 0 49 26208 50 0 51 0 52 35532 53 0 54 60480 55 37296 56 0 57 0 58 48780 59 0 60 0 61 50400 62 0