# A218307 (b-file synthesized from sequence entry) 0 1 1 1 2 10 3 244 4 9288 5 483216 6 31949216 7 2564959552 8 242374510720 9 26355555496192 10 3241906046249472 11 445085008158569472 12 67469834196870809600 13 11192986206960277688320 14 2017105871358529382883328 15 392394481517424330142203904 16 81955683182673295403291541504