Numbers n such that sigma(n) = sigma(n-1) + sigma(n-2).

Terms

a(0) =3a(1) =4a(2) =24a(3) =1968a(4) =3264a(5) =5016a(6) =60456a(7) =1016508a(8) =4420164a(9) =12055512a(10) =14365608a(11) =25726728a(12) =27896424a(13) =66562308a(14) =72764736a(15) =98734968a(16) =175186656a(17) =224868312a(18) =253694928a(19) =288657204a(20) =386668344a(21) =421575408a(22) =504737748a(23) =630645456a(24) =1493548000a(25) =1653797796a(26) =2120325012a(27) =2221315152