Numbers k such that s(k) = s(k+2), where s(k) is the sum of odd divisors of k (A000593).

Terms

a(0) =2a(1) =33a(2) =2913a(3) =4187a(4) =7169a(5) =9359a(6) =12565a(7) =15085a(8) =21461a(9) =24881a(10) =25019a(11) =26609a(12) =46863a(13) =49225a(14) =51835a(15) =53963a(16) =54178a(17) =59987a(18) =77057a(19) =81055a(20) =101101a(21) =127585a(22) =143369a(23) =149149a(24) =150419a(25) =170561a(26) =205727a(27) =215069a(28) =220817a(29) =230578