180325

Appears in sequences

• Central pentanomial coefficients: largest coefficient of (1 + x + ... + x^4)^n.at n=9A005191
• Square array read by diagonals: T(n,k) = number of arrays of n integers in -k..k with sum equal to 0.at n=53A201552
• T(n,k)=Number of zero-sum nXk -2..2 arrays with every element unequal to at most two horizontal and vertical neighbors.at n=36A201803
• Number of arrays of 9 integers in -n..n with sum zero.at n=2A322536