# A157404 (b-file synthesized from sequence entry) 1 1 2 1 3 4 4 1 5 12 6 36 7 1 8 72 9 144 10 504 11 1 12 280 13 1800 14 2520 15 9576 16 1 17 1740 18 22320 19 37800 20 57456 21 229824 22 1 23 8484 24 182700 25 864360 26 1005480 27 1608768 28 6664896 29 1 30 57232 31 2380896 32 16546320 33 26276544 34 32175360 35 53319168 36 226606464