Number of cyclic arrangements of S={1,2,...,2n} such that the difference between any two neighbors is 3^k for some k=0,1,2,...
A242520
Number of cyclic arrangements of S={1,2,...,2n} such that the difference between any two neighbors is 3^k for some k=0,1,2,...
Terms
- a(0) =1a(1) =1a(2) =2a(3) =3a(4) =27a(5) =165a(6) =676a(7) =3584a(8) =19108a(9) =80754a(10) =386776a(11) =1807342a(12) =8218582a(13) =114618650a(14) =1410831012a(15) =12144300991a(16) =126350575684
External references
- oeis: A242520