Numbers k that divide the k-th Apéry number (A005258).

Terms

a(0) =1a(1) =3a(2) =21a(3) =147a(4) =217a(5) =781a(6) =903a(7) =1323a(8) =3249a(9) =3267a(10) =3591a(11) =5929a(12) =6897a(13) =7623a(14) =8001a(15) =8673a(16) =10017a(17) =11187a(18) =11997a(19) =17181a(20) =21413a(21) =21791a(22) =23529a(23) =38829a(24) =51183a(25) =54033a(26) =58653a(27) =68229a(28) =71391a(29) =75593