# A075377 (b-file synthesized from sequence entry) 1 1 2 1 3 1 4 1 5 6 6 1 7 1 8 60 9 1 10 1 11 840 12 5040 13 1 14 10080 15 1 16 15120 17 1 18 1 19 332640 20 3326400 21 19958400 22 1 23 1 24 8648640 25 1 26 1816214400 27 1 28 259459200 29 36324288000 30 217945728000 31 1307674368000 32 1 33 1 34 8821612800 35 1482030950400 36 88921857024000 37 1 38 1