Number of permutations of length n without modular consecutive triples i,i+2,i+4.
A174073
Number of permutations of length n without modular consecutive triples i,i+2,i+4.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =3a(4) =24a(5) =100a(6) =594a(7) =4389a(8) =35744a(9) =325395a(10) =3288600a(11) =36489992a(12) =441091944a(13) =5770007009a(14) =81213883898
External references
- oeis: A174073