# A111936 (b-file synthesized from sequence entry) 1 1 2 2 3 6 4 12 5 60 6 20 7 140 8 280 9 280 10 3080 11 9240 12 120120 13 120120 14 40040 15 80080 16 1361360 17 12252240 18 2450448 19 2450448 20 2450448 21 56360304 22 56360304 23 1409007600 24 1409007600 25 4227022800 26 4227022800 27 4227022800 28 131037706800 29 262075413600