Number of n-bead necklaces labeled with numbers 1..5 not allowing reversal, with no adjacent beads differing by more than 1.

A208774

Number of n-bead necklaces labeled with numbers 1..5 not allowing reversal, with no adjacent beads differing by more than 1.

Terms

    a(0) =5a(1) =9a(2) =13a(3) =24a(4) =41a(5) =91a(6) =185a(7) =435a(8) =1009a(9) =2445a(10) =5945a(11) =14813a(12) =36977a(13) =93465a(14) =237313a(15) =606465a(16) =1556033a(17) =4010205a(18) =10367897a(19) =26891385a(20) =69930457a(21) =182302161a(22) =476262761a(23) =1246710303a(24) =3269321393a(25) =8587489185a(26) =22590646417a(27) =59511087087a(28) =156973954865a(29) =414552479249

External references