Numbers k such that k and k+2 have the same number (A000005) and sum of divisors (A000203).

Terms

a(0) =33a(1) =54a(2) =918a(3) =1240a(4) =3304a(5) =4148a(6) =4187a(7) =7169a(8) =12565a(9) =15085a(10) =19688a(11) =24881a(12) =25019a(13) =26609a(14) =38982a(15) =51835a(16) =53963a(17) =59987a(18) =76360a(19) =77057a(20) =96728a(21) =143369a(22) =150419a(23) =167560a(24) =170561a(25) =205727a(26) =215069a(27) =220817a(28) =278920a(29) =418307