42044domain: NAppears in sequencesa(n) = sigma_3(n) - sigma_2(n).at n=34A092349a(n) = 10 + floor( (1 + Sum_{j=1..n-1} a(j) )/3 ).at n=29A120155a(n) = 3*a(n-1) + 6*a(n-2) + a(n-3) with a(0)=2, a(1)=5, a(2)=26.at n=7A214951a(n) = 4*n*(21*n - 26).at n=23A263229