# A223523 (b-file synthesized from sequence entry) 1 1 2 3 3 2 4 15 5 20 6 4 7 105 8 210 9 84 10 8 11 945 12 2520 13 1512 14 288 15 16 16 10395 17 34650 18 27720 19 7920 20 880 21 32 22 135135 23 540540 24 540540 25 205920 26 34320 27 2496 28 64 29 2027025 30 9459450 31 11351340 32 5405400 33 1201200 34 131040 35 6720 36 128