Number of 6-cycles in the n-Fibonacci cube graph.

Terms

a(0) =0a(1) =0a(2) =0a(3) =2a(4) =22a(5) =82a(6) =268a(7) =742a(8) =1902a(9) =4562a(10) =10452a(11) =23068a(12) =49432a(13) =103364a(14) =211764a(15) =426354a(16) =845626a(17) =1655454a(18) =3203876a(19) =6137946a(20) =11652946a(21) =21944034a(22) =41021256a(23) =76174360a(24) =140595760a(25) =258061160a(26) =471255240a(27) =856536610a(28) =1550048766a(29) =2793774026