Numbers k that divide s(k), where s(1)=1, s(j)=25*s(j-1)+j.

Terms

a(0) =1a(1) =3a(2) =5a(3) =9a(4) =15a(5) =21a(6) =25a(7) =27a(8) =45a(9) =55a(10) =63a(11) =75a(12) =81a(13) =93a(14) =105a(15) =135a(16) =147a(17) =165a(18) =171a(19) =189a(20) =225a(21) =243a(22) =275a(23) =279a(24) =315a(25) =355a(26) =405a(27) =441a(28) =465a(29) =495