106105

Appears in sequences

• a(n) = Sum[2^(A047260(i)-1), {i,1,n}].at n=10A113828
• a(n) = a(n - 1) - 2*a(n - 2) + a(n - 3) - 2*a(n - 4) + a(n - 5).at n=50A122582