488964567014domain: NAppears in sequencesTop line of 3-wave sequence A038196, also bisection of A006356.at n=17A038213First row sum of the matrix M^n, where M is the 3 X 3 matrix [[6, 5, 3], [5, 4, 2], [3, 2, 1]] (n>=0).at n=11A122187