1766496

Appears in sequences

• Number of (n+1) X (n+1) -4..4 symmetric matrices with every 2 X 2 subblock having sum zero and three distinct values.at n=17A211491
• Expansion of 256/(lambda(z)*(1 - lambda(z)))^2 in powers of nome q = exp(Pi*i*z) where lambda(z) is the elliptic modular function (A115977).at n=5A290403