Number of cyclic arrangements of S={2,3,...,n+1} such that the difference of any two neighbors is greater than 1, and a divisor of their sum.
A242532
Number of cyclic arrangements of S={2,3,...,n+1} such that the difference of any two neighbors is greater than 1, and a divisor of their sum.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =0a(7) =0a(8) =1a(9) =0a(10) =0a(11) =0a(12) =0a(13) =20a(14) =39a(15) =0a(16) =0a(17) =0a(18) =0a(19) =319a(20) =967a(21) =0a(22) =0a(23) =1464a(24) =6114a(25) =16856a(26) =44370a(27) =0a(28) =0a(29) =0
External references
- oeis: A242532