Number of essentially different ways of arranging numbers 1 through 2n around a circle so that the sum and absolute difference of each pair of adjacent numbers are prime.
A227050
Number of essentially different ways of arranging numbers 1 through 2n around a circle so that the sum and absolute difference of each pair of adjacent numbers are prime.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =2a(6) =1a(7) =4a(8) =88a(9) =0a(10) =976a(11) =22277a(12) =22365a(13) =376002a(14) =3172018a(15) =5821944a(16) =10222624a(17) =424452210a(18) =6129894510a(19) =38164752224
External references
- oeis: A227050