Numbers k such that sigma(k) = sigma(k+8).

Terms

a(0) =15a(1) =69a(2) =87a(3) =102a(4) =132a(5) =175a(6) =230a(7) =638a(8) =689a(9) =1127a(10) =1349a(11) =1392a(12) =2006a(13) =5170a(14) =6680a(15) =8366a(16) =8390a(17) =11652a(18) =11918a(19) =12128a(20) =16748a(21) =19511a(22) =19829a(23) =23318a(24) =24597a(25) =24734a(26) =25122a(27) =27162a(28) =28676a(29) =30730