Numbers k that divide s(k), where s(1)=1, s(j)=9*s(j-1)+j.

Terms

a(0) =1a(1) =3a(2) =9a(3) =21a(4) =39a(5) =63a(6) =117a(7) =147a(8) =171a(9) =273a(10) =333a(11) =441a(12) =507a(13) =819a(14) =903a(15) =1029a(16) =1197a(17) =1521a(18) =1911a(19) =2223a(20) =2331a(21) =2709a(22) =3081a(23) =3087a(24) =3249a(25) =3549a(26) =4329a(27) =5733a(28) =6123a(29) =6321