Numbers k such that sigma(k) = sigma(k+6).

Terms

a(0) =20a(1) =155a(2) =182a(3) =184a(4) =203a(5) =264a(6) =621a(7) =650a(8) =702a(9) =852a(10) =893a(11) =944a(12) =1343a(13) =1357a(14) =2024a(15) =2544a(16) =2990a(17) =4130a(18) =4183a(19) =4450a(20) =5428a(21) =5835a(22) =6149a(23) =6313a(24) =6572a(25) =8177a(26) =8695a(27) =11208a(28) =11333a(29) =11991