# A134558 (b-file synthesized from sequence entry) 0 1 1 1 2 1 3 2 4 2 5 1 6 6 7 5 8 3 9 1 10 24 11 16 12 10 13 4 14 1 15 120 16 65 17 38 18 17 19 5 20 1 21 720 22 326 23 168 24 78 25 26 26 6 27 1 28 5040 29 1957 30 872 31 393 32 142 33 37 34 7 35 1 36 40320 37 13700 38 5296 39 2208 40 824 41 236 42 50 43 8 44 1 45 362880 46 109601 47 37200 48 13977 49 5144 50 1569 51 366 52 65 53 9 54 1 55 3628800 56 986410 57 297856