# A094283 (b-file synthesized from sequence entry) 1 1 2 5 3 15 4 45 5 90 6 180 7 360 8 720 9 1440 10 2880 11 5760 12 11520 13 23040 14 46080 15 92160 16 184320 17 368640 18 737280 19 1474560 20 2949120 21 5898240 22 11796480 23 23592960 24 47185920 25 94371840 26 188743680 27 377487360 28 754974720 29 1509949440