343210domain: NAppears in sequencesAverages of two consecutive odd cubes; a(n) = (n^3 + (n+2)^3)/2.at n=34A173962Gog words avoiding the subpattern 312.at n=7A180349Number of subsets of {1..n} (including empty set) such that the pairwise sums of distinct elements are all distinct.at n=30A196723