42354

Appears in sequences

• Number of 7X7 arrays of squares of integers, symmetric about main diagonal, with all rows summing to n.at n=4A156391
• Number of n X n arrays of squares of integers, symmetric about main diagonal, with all rows summing to 4.at n=6A156434
• G.f. satisfies: A(x) = 1 + x*A(x)^2*A(-x)^2 + x^2*(A(x)^2 + A(-x)^2).at n=12A233896