# A167550 (b-file synthesized from sequence entry) 1 1 2 7 3 62 4 762 5 12264 6 245640 7 5897520 8 165145680 9 5284782720 10 190253266560 11 7610141548800 12 334846347897600 13 16072626136089600 14 835776577757721600 15 46803488615967283200 16 2808209320881060096000 17 179725396599156215808000