Number of circular arrangements of the first n positive integers such that adjacent terms have absolute difference 1 or 4.
A336749
Number of circular arrangements of the first n positive integers such that adjacent terms have absolute difference 1 or 4.
Terms
- a(0) =1a(1) =0a(2) =1a(3) =1a(4) =1a(5) =3a(6) =2a(7) =3a(8) =6a(9) =5a(10) =10a(11) =12a(12) =14a(13) =25a(14) =27a(15) =40a(16) =57a(17) =68a(18) =104a(19) =133a(20) =177a(21) =255a(22) =324a(23) =454a(24) =617a(25) =811a(26) =1136a(27) =1507a(28) =2042a(29) =2803
External references
- oeis: A336749