Numbers k that divide sigma(k) + sigma(k-1).

Terms

a(0) =2a(1) =6a(2) =34a(3) =50a(4) =216a(5) =236a(6) =262a(7) =386a(8) =898a(9) =924a(10) =945a(11) =1456a(12) =2380a(13) =5356a(14) =6468a(15) =6624a(16) =8362a(17) =14100a(18) =23496a(19) =26938a(20) =46594a(21) =80876a(22) =196344a(23) =212796a(24) =1661136a(25) =4070200a(26) =4160920a(27) =4626700a(28) =5244548a(29) =5462384