125532domain: NAppears in sequencesNumber of arrays of 5 integers in -n..n with sum zero and the sum of every adjacent pair being odd.at n=20A202077G.f. A(x,y) satisfies: x*y*A(x,y) = Sum_{n=-oo..+oo} (-1)^n * x^(n*(n+1)/2) * A(x,y)^n, with coefficients T(n,k) of x^n*y^k in A(x,y) given as a triangle read by rows.at n=52A355360