# A066332 (b-file synthesized from sequence entry) 1 1 2 1 3 2 4 6 5 24 6 30 7 180 8 210 9 1680 10 1890 11 2100 12 2310 13 27720 14 30030 15 420420 16 450450 17 480480 18 510510 19 9189180 20 9699690 21 193993800 22 203693490 23 213393180 24 223092870 25 5354228880 26 5577321750 27 5800414620 28 6023507490 29 6246600360 30 6469693230 31 194090796900 32 200560490130