Numbers k such that sigma(k+2) = sigma(k+1) + sigma(k).

Terms

a(0) =1a(1) =2a(2) =22a(3) =1966a(4) =3262a(5) =5014a(6) =60454a(7) =1016506a(8) =4420162a(9) =12055510a(10) =14365606a(11) =25726726a(12) =27896422a(13) =66562306a(14) =72764734a(15) =98734966a(16) =175186654a(17) =224868310a(18) =253694926a(19) =288657202a(20) =386668342a(21) =421575406a(22) =504737746a(23) =630645454a(24) =1493547998a(25) =1653797794a(26) =2120325010a(27) =2221315150