45776367187domain: NAppears in sequencesSum_{T(i,j)}, 0<=j<=i, 0<=i<=n, where T is the array in A026386.at n=29A026396a(n) = (3*5^n - 1)/2.at n=15A057651a(n) = 5*a(n-2) + 2, a(0) = 1, a(1) = 2.at n=30A238366