234881022

Appears in sequences

• a(n) = Sum_{k=0..n} A026615(n, k).at n=27A026622
• a(0)=1, a(1)=2, a(2)=1; for n>2, a(n) = 7*2^(n-3)-2.at n=28A174317
• a(n) = 7*2^n - 2.at n=25A176448