# A099133 (b-file synthesized from sequence entry) 0 0 1 1 2 4 3 32 4 192 5 1280 6 8192 7 53248 8 344064 9 2228224 10 14417920 11 93323264 12 603979776 13 3909091328 14 25300041728 15 163745628160 16 1059783180288 17 6859062771712 18 44392781971456 19 287316132233216 20 1859549040476160 21 12035254277636096 22 77893801758162944