Numbers k that divide the sum of the first k composite numbers.

Terms

a(0) =1a(1) =2a(2) =3a(3) =7a(4) =11a(5) =71a(6) =107a(7) =115a(8) =139a(9) =155a(10) =681a(11) =1671a(12) =4876a(13) =21464a(14) =30046a(15) =311271a(16) =788749a(17) =10893662a(18) =20743270a(19) =134568163a(20) =163879554a(21) =920161004a(22) =6364787032a(23) =21400458779a(24) =47934932406a(25) =56133884369a(26) =288050185452a(27) =536023681676