# Computed using the Mathematica program that I contributed to this sequence 1 2 2 3 3 5 4 17 5 257 6 12289 7 14155777 8 169869313 9 4076863489 10 32318253138475745281 11 12806790724213976503626296721408001 12 307362977381135436087031121313792001 13 411383991730376785046315114944700930343796927114075459119001963950243840000000001 14 30054642247764145633451584940605492567008765071528448386850995908616421171073017446400000000000001 15 8603905279200766701846308275368753821043990708637581944900409885421088554862975378872803236193819907049333868032173906329600000000000000000000001 16 442778999936951879634010680637918818946591066039300065502440018009618320697446786457078879771991322359558856029272402056599618400753040547889947432634832772555524019528020130742434529280000000000000000000000000000001 17 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