Complexity of doubled cycle (regarding case n = 2 as a graph).

A072373

Complexity of doubled cycle (regarding case n = 2 as a graph).

Terms

    a(0) =1a(1) =4a(2) =75a(3) =384a(4) =1805a(5) =8100a(6) =35287a(7) =150528a(8) =632025a(9) =2620860a(10) =10759331a(11) =43804800a(12) =177105253a(13) =711809364a(14) =2846259375a(15) =11330543616a(16) =44929049777a(17) =177540878700a(18) =699402223099

External references