Number of 6-cycles in the n-hypercube graph.

Terms

a(0) =0a(1) =0a(2) =0a(3) =16a(4) =128a(5) =640a(6) =2560a(7) =8960a(8) =28672a(9) =86016a(10) =245760a(11) =675840a(12) =1802240a(13) =4685824a(14) =11927552a(15) =29818880a(16) =73400320a(17) =178257920a(18) =427819008a(19) =1016070144a(20) =2390753280a(21) =5578424320a(22) =12918456320a(23) =29712449536a(24) =67914170368a(25) =154350387200a(26) =348966092800a(27) =785173708800