# A097001 (b-file synthesized from sequence entry) 1 2 2 4 3 12 4 16 5 72 6 252 7 312 8 256 9 1512 10 1860 11 12264 12 6552 13 26208 14 34200 15 93600 16 65536 17 833280 18 1116024 19 2239920 20 4464096 21 9865440 22 8124480 23 569540160 24 569540160 25 1100946774480 26 1100946774480 27 1100946774480 28 1100946774480 29 34696672920