3112960domain: NAppears in sequencesa(1) = 4; a(n) = smallest composite number greater than the sum of all previous terms.at n=20A070232Triangular array read by rows: 3 dimensional analog of A227997.at n=19A229955(1/4) times the sum of the elements of all subsets of [n] whose sum is divisible by four.at n=19A309296