193710246

Appears in sequences

• Number of vertices in Sierpiński triangle of order n.at n=17A067771
• a(0) = 2, a(n) = 3*a(n-1) - 3.at n=18A115098
• a(n) = 6 * A015518(n).at n=17A120471
• a(n) = 3*A132357(n).at n=16A135264