-7743

Appears in sequences

• Square array T(n,k), n >= 1, k >= 0, read by antidiagonals downwards, where T(n,k) = Sum_{j=1..n} (-k)^(floor(n/j) - 1).at n=71A345033
• a(n) = Sum_{k=1..n} (-n)^(floor(n/k) - 1).at n=5A345036