2391486

Appears in sequences

• Number of vertices in Sierpiński triangle of order n.at n=13A067771
• a(0) = 2, a(n) = 3*a(n-1) - 3.at n=14A115098
• a(n) = 6 * A015518(n).at n=13A120471
• Sum of the divisors of 3^n-1.at n=12A366576