# A376420 (b-file synthesized from sequence entry) 2 3 3 9 4 36 5 162 6 800 7 5248 8 41984 9 364544 10 3639168 11 39937536 12 479250432 13 6227066880 14 87178936320 15 1307674935296 16 20922798964736 17 355687506903040