3412176domain: NAppears in sequencesNumber of permutations of length n with no consecutive triples i,i+2,i+4.at n=10A174072Triangle read by rows: number of permutations of [1..n] with k progressions of rise 2, distance 1 and length 3 (n >= 0, k >= 0).at n=25A216716Duplicate of A174072.at n=9A216717