# A057170 (b-file synthesized from sequence entry) 0 1 1 2 2 12 3 288 4 26880 5 10035200 6 14836039680 7 87734404251648 8 2064716402685640704 9 194361783607326689722368 10 72958995691997968023051829248 11 109548594452892660460226753134067712 12 656593430123179564638165745256190909087744 13 15741504841171021653720624575980053578961033101312