3844779

Appears in sequences

• a(n) = a(n-1) + 4*a(n-2) - 4*a(n-3) for n>3.at n=22A136336
• a(n) = (11*4^n + 1)/3.at n=10A199210
• a(0) = 4, a(n) = 2*a(n-1) + (-1)^n.at n=20A383953