Number of integer partitions of n whose parts minus 1 are relatively prime.

Terms

a(0) =0a(1) =0a(2) =1a(3) =1a(4) =2a(5) =3a(6) =5a(7) =8a(8) =12a(9) =18a(10) =27a(11) =38a(12) =53a(13) =74a(14) =102a(15) =137a(16) =184a(17) =241a(18) =317a(19) =413a(20) =536a(21) =687a(22) =880a(23) =1112a(24) =1405a(25) =1765a(26) =2215a(27) =2755a(28) =3424a(29) =4229