Number of integer partitions of n whose odd parts have a common divisor > 1.

Terms

a(0) =0a(1) =0a(2) =0a(3) =1a(4) =0a(5) =2a(6) =1a(7) =4a(8) =1a(9) =8a(10) =3a(11) =13a(12) =6a(13) =21a(14) =10a(15) =36a(16) =15a(17) =53a(18) =28a(19) =80a(20) =41a(21) =122a(22) =63a(23) =174a(24) =97a(25) =250a(26) =140a(27) =359a(28) =201a(29) =496