# A165680 (b-file synthesized from sequence entry) 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 1 10 2 11 1 12 1 13 1 14 2 15 6 16 1 17 1 18 1 19 2 20 6 21 24 22 1 23 1 24 1 25 2 26 6 27 24 28 120 29 1 30 1 31 1 32 2 33 6 34 24 35 120 36 720 37 1 38 1 39 1 40 2 41 6 42 24 43 120 44 720 45 5040 46 1 47 1 48 1 49 2 50 6 51 24 52 120 53 720 54 5040 55 40320 56 1 57 1 58 1 59 2 60 6 61 24 62 120 63 720 64 5040 65 40320 66 362880