A062824 Ch(A005117(n)) where Ch(n) is Chowla's function and A005117(n) are the squarefree numbers.

-1, 0, 0, 0, 5, 0, 7, 0, 0, 9, 8, 0, 0, 10, 13, 0, 15, 0, 41, 0, 14, 19, 12, 0, 21, 16, 0, 53, 0, 25, 0, 20, 0, 16, 22, 31, 0, 0, 33, 18, 77, 0, 26, 73, 0, 0, 39, 18, 89, 0, 43, 0, 22, 45, 32, 0, 20, 34, 49, 24, 0, 0, 113, 0, 86, 55, 0, 0, 105, 40, 0, 125, 28, 61, 24, 63, 44, 0, 46, 121, 0, 26, 69, 0, 149, 0, 50, 73, 24, 34, 75, 0