a(n) is the greatest k > 0 such that Sum_{j=1..n} j*(-k)^j/(k+n) is an integer, for n > 1 and a(n) != n + 1.

A335114

a(n) is the greatest k > 0 such that Sum_{j=1..n} j*(-k)^j/(k+n) is an integer, for n > 1 and a(n) != n + 1.