Sociable numbers: smallest member of each cycle (conjectured).

Terms

a(0) =12496a(1) =14316a(2) =1264460a(3) =2115324a(4) =2784580a(5) =4938136a(6) =7169104a(7) =18048976a(8) =18656380a(9) =28158165a(10) =46722700a(11) =81128632a(12) =174277820a(13) =209524210a(14) =330003580a(15) =498215416a(16) =805984760a(17) =1095447416a(18) =1236402232a(19) =1276254780a(20) =1799281330