Numbers that divide the average of the squares of their aliquot parts.

Terms

a(0) =10a(1) =65a(2) =140a(3) =420a(4) =2100a(5) =2210a(6) =20737a(7) =32045a(8) =200725a(9) =207370a(10) =1204350a(11) =1347905a(12) =1762645a(13) =16502850a(14) =31427800a(15) =37741340a(16) =107671200a(17) =130643100a(18) =200728169a(19) =239719720a(20) =357491225a(21) =417225900a(22) =430085380a(23) =766750575a(24) =1088692500a(25) =1132409168a(26) =1328204850a(27) =1788379460