Integer quotients of partial sum of first n composite and n (see A053781).

Terms

a(0) =4a(1) =5a(2) =6a(3) =9a(4) =12a(5) =52a(6) =75a(7) =80a(8) =95a(9) =105a(10) =422a(11) =1002a(12) =2841a(13) =12165a(14) =16944a(15) =170997a(16) =430041a(17) =5844984a(18) =11095683a(19) =71438394a(20) =86938085a(21) =485470043a(22) =3341061731a(23) =11203279551a(24) =25053055391a(25) =29329179630a(26) =150058180590a(27) =278953774325a(28) =771115150044