a(n) = A340312(n, 2^(n-1)). a(n) is the central term of row n of A340312.

A340259

a(n) = A340312(n, 2^(n-1)). a(n) is the central term of row n of A340312.

Terms

    a(0) =1a(1) =0a(2) =14a(3) =870a(4) =18796230

External references