A050331 Number of factorizations into numbers with an odd number of prime factors indexed by prime signatures. A050330(A025487).

1, 1, 1, 1, 2, 2, 2, 3, 2, 3, 3, 4, 4, 4, 5, 6, 6, 5, 8, 7, 8, 5, 9, 10, 6, 11, 13, 11, 9, 13, 14, 8, 16, 20, 14, 17, 20, 15, 21, 10, 22, 22, 20, 21, 31, 19, 27, 29, 26, 29, 12, 37, 30, 12, 36, 32, 46, 24, 42, 41, 44, 40, 15, 58, 40, 27, 61, 48, 49, 66, 31, 43, 63, 64, 56, 70, 68