1355971712

Appears in sequences

• a(n) = (7*3^n + 1)/2.at n=18A199109
• a(n) = (7*9^n + 1)/2.at n=9A199566
• a(n) = 3*a(n-1) + 2*3^n - 1, a(0) = 0.at n=16A392084