7174452

Appears in sequences

• a(n) = (3^n - 3)/2.at n=14A029858
• a(n) = 3*(a(n-2) + 1), with a(0) = 1, a(1) = 3.at n=27A087503
• Expansion of (1+3x)/((1-x^2)(1-3x^2)).at n=27A094025
• a(n) = 6 * A015518(n).at n=14A120471
• a(0) = 1, a(1) = 3, a(n) = 3*a(n-1) + 3 for n > 1.at n=14A123109
• a(n) = 3*A132357(n).at n=13A135264