417566265

Appears in sequences

• a(n) = 3*a(n-1) - 4*a(n-3), with a(0)=1, a(1)=2, a(2)=4, a(3)=9.at n=27A136298
• Smallest positive integer solution x of 9*x - 2^n*y = 1.at n=29A234038
• a(0) = 0, a(n+1) = 2*a(n) + (-1)^floor(n/3).at n=29A275788