Nonprimes k that divide the sum of the nonprimes up to k.

Terms

a(0) =1a(1) =22a(2) =25a(3) =118a(4) =414a(5) =2745a(6) =10623a(7) =63201a(8) =1039161a(9) =1693864a(10) =2285297a(11) =52962021a(12) =66998865a(13) =232974402a(14) =315796805a(15) =336125877a(16) =834972771a(17) =1233903294a(18) =1309750075a(19) =1617454215a(20) =2056836133a(21) =5455816485a(22) =8589896196a(23) =9030058217a(24) =10622144467a(25) =12324258770a(26) =33725308558