Numbers k that divide s(k), where s(1)=1, s(j)=13*s(j-1)+j.

Terms

a(0) =1a(1) =3a(2) =9a(3) =13a(4) =27a(5) =39a(6) =81a(7) =117a(8) =183a(9) =243a(10) =351a(11) =549a(12) =689a(13) =729a(14) =1053a(15) =1647a(16) =2067a(17) =2187a(18) =2379a(19) =3081a(20) =3159a(21) =4941a(22) =6201a(23) =6561a(24) =7137a(25) =9243a(26) =9477a(27) =11163a(28) =14823a(29) =18603