131409

Appears in sequences

• a(n) = min( x : x^4 + n^4 = 0 mod (x+n-1) ).at n=32A066487
• Number of (4+1) X (n+1) 0..2 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing x(i,j)+x(i-1,j) in the j direction.at n=20A250759