# A319313 (b-file synthesized from sequence entry) 3 6 4 2 5 20 6 3 7 1008 8 4 9 72 10 5 11 4400 12 144 13 835660800 14 7 15 10800 16 8 17 272 18 9 19 9849600 20 400 21 208039104 22 11 23 145520912351232000000 24 64281600 25 3608344625286776094720000 26 13 27 1296 28 84672 29 90944 30 129600