81167

Appears in sequences

• a(n) = (1/2)*s(n+3), where s = A025248.at n=14A025249
• a(n) cannot be prefixed or followed by any digit to form a prime ('empty' prefixes allowed).at n=24A032736
• Expansion of (1 - x - sqrt(1 - 2*x + x^2 - 8*x^3)) / (4*x^2) in powers of x.at n=16A091565
• a(0)=1; for n >= 1, a(n) is the number of subsets of [a(0), a(1), ..., a(n-1)] whose sum is equal to a(n-1).at n=34A265853