# A097652 (b-file synthesized from sequence entry) 1 1 2 2 3 20 4 48 5 180 6 208 7 864 8 1120 9 1368 10 3552 11 58320 12 76416 13 79968 14 95488 15 107520 16 338688 17 570240 18 595968 19 653184 20 1347840 21 5199552 22 7918848 23 14592000 24 93699072 25 159138176 26 167078784 27 246688000 28 281640960 29 314548224 30 323985408 31 338411520 32 347578368 33 352002048