Numbers k such that sigma(k) = sigma(k+7).

Terms

a(0) =10a(1) =62a(2) =188a(3) =362a(4) =759a(5) =1178a(6) =1214a(7) =1431a(8) =1442a(9) =1598a(10) =1695a(11) =1748a(12) =2235a(13) =3495a(14) =6699a(15) =9338a(16) =9945a(17) =11438a(18) =13695a(19) =18795a(20) =20727a(21) =26199a(22) =26631a(23) =30548a(24) =35438a(25) =53751a(26) =79826a(27) =79827a(28) =89378a(29) =103887