Number of circular permutations of length n without consecutive triples i,i+2,i+4.
A174074
Number of circular permutations of length n without consecutive triples i,i+2,i+4.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =2a(4) =6a(5) =22a(6) =109a(7) =657a(8) =4625a(9) =37186a(10) =336336a(11) =3379058a(12) =37328103a(13) =449669577a(14) =5866178493a(15) =82387080624
External references
- oeis: A174074