A067172 Numbers n such that sigma(n-2)+sigma(n+2)=sigma(2n).

4, 16, 272, 284, 604, 4556, 6904, 8413, 10463, 12070, 19004, 23290, 26284, 29944, 40312, 44252, 107557, 114616, 230987, 239134, 276476, 332022, 343793, 403196, 501008, 762078, 771130, 893606, 1013348, 1160192, 1731290, 1807016, 2066404