9400192

Appears in sequences

• a(n) = Sum_{k=0..floor(n/2)} (-1)^k * binomial(n,2*k)^2.at n=15A307091
• Square array T(n,k), n >= 0, k >= 0, read by antidiagonals, where column k is the expansion of sqrt(2 / ( (1-2*(k+4)*x+((k-4)*x)^2) * (1+(k-4)*x+sqrt(1-2*(k+4)*x+((k-4)*x)^2)) )).at n=52A337369
• Expansion of sqrt(2 / ( (1-12*x+4*x^2) * (1-2*x+sqrt(1-12*x+4*x^2)) )).at n=7A337370