267137

Appears in sequences

• a(n) = Sum_{k=0..n} T(n,k) * T(n,2n-k), with T given by A027082.at n=10A027104
• a(1) = 1, otherwise a(n) = floor(Pi^(n+1)/(Pi^2 + 1)).at n=12A090426
• Round(Pi^(n+1)/(Pi^2 + 1)).at n=12A195675