# A068205 (b-file synthesized from sequence entry) 1 4 2 8 3 32 4 96 5 1536 6 960 7 184320 8 161280 9 8257536 10 2903040 11 14863564800 12 638668800 13 1569592442880 14 49816166400 15 5713316492083200 16 83691159552000 17 1096956766479974400 18 2845499424768000 19 6713375410857443328000