# A111184 (b-file synthesized from sequence entry) 0 1 1 0 2 1 3 0 4 2 5 1 6 0 7 6 8 6 9 1 10 0 11 24 12 34 13 12 14 1 15 0 16 120 17 210 18 110 19 20 20 1 21 0 22 720 23 1452 24 974 25 270 26 30 27 1 28 0 29 5040 30 11256 31 8946 32 3248 33 560 34 42 35 1 36 0 37 40320 38 97296 39 87504 40 38338 41 8792 42 1036 43 56 44 1