Numbers k that divide the sum of the first k nonprimes.

Terms

a(0) =1a(1) =8a(2) =32a(3) =44a(4) =577a(5) =5066a(6) =5669a(7) =8615a(8) =39787a(9) =59689a(10) =109752a(11) =146328a(12) =15451380a(13) =22173220a(14) =28558717a(15) =332573533a(16) =1837410366a(17) =3289933379a(18) =19053646133a(19) =370648112641