Number of integer partitions of n whose parts are not in arithmetic progression.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =1a(5) =3a(6) =4a(7) =10a(8) =15a(9) =21a(10) =33a(11) =49a(12) =63a(13) =93a(14) =124a(15) =160a(16) =218a(17) =287a(18) =365a(19) =479a(20) =610a(21) =771a(22) =986a(23) =1242a(24) =1548a(25) =1941a(26) =2418a(27) =2984a(28) =3696a(29) =4549