Number of permutations of length n with no consecutive triples i,i+2,i+4 or i,i-2,i-4.
A174076
Number of permutations of length n with no consecutive triples i,i+2,i+4 or i,i-2,i-4.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =24a(5) =108a(6) =632a(7) =4408a(8) =35336a(9) =319056a(10) =3205824a(11) =35451984a(12) =427683560a(13) =5588310904a(14) =78615281768
External references
- oeis: A174076