151097

Appears in sequences

• a(n) = (1/9)*((6*n - 7)*2^(n-1) - (-1)^n).at n=14A113861
• a(0)=0, a(1)=1, a(n) = min{4 a(k) + (4^(n-k)-1)/3, k=0..(n-1)} for n>=2.at n=35A259665