A055873 a(0) = 1; a(n) = sum_{k=1 to d(n)} [a(n-k)] where d(n) is number of positive divisors of n.

1, 1, 2, 3, 6, 9, 20, 29, 64, 113, 226, 339, 791, 1130, 2486, 4746, 9492, 14238, 32883, 47121, 110966, 205208, 396178, 601386, 1417472, 2415036, 4830072, 9263966, 18924110, 28188076, 66036296, 94224372, 221466892, 409915636, 791643196