4793266domain: NAppears in sequencesa(n) = (6*n^4 + 30*n^3 - 20*n^2 + 14)*n/30 + (n mod 2).at n=29A064837a(n) is the number of binary strings of length n such that no subsequence of length 5 or less contains 3 or more ones.at n=31A120118