Numbers k such that sigma(k) = sigma(k - d(k)).

Terms

a(0) =55a(1) =110a(2) =119a(3) =188a(4) =238a(5) =280a(6) =323a(7) =352a(8) =646a(9) =748a(10) =1007a(11) =1780a(12) =2014a(13) =2016a(14) =2508a(15) =2589a(16) =2684a(17) =4187a(18) =5178a(19) =5963a(20) =6900a(21) =8183a(22) =8374a(23) =11663a(24) =11926a(25) =12371a(26) =16366a(27) =23326a(28) =24742a(29) =28780