Numbers k such that sigma(k) = sigma(k+3).

Terms

a(0) =382a(1) =8922a(2) =11935a(3) =31815a(4) =32442a(5) =61982a(6) =123795a(7) =145915a(8) =186615a(9) =271215a(10) =442362a(11) =554715a(12) =560382a(13) =580635a(14) =964535a(15) =1191575a(16) =1243375a(17) =1369302a(18) =1539942a(19) =1642795a(20) =2616702a(21) =3141215a(22) =3299062a(23) =3556035a(24) =3716895a(25) =4201015a(26) =5148294