Numbers k such that k divides s(k), where s(1)=1, s(j)= s(j-1) + j*7^(j-1).

Terms

a(0) =1a(1) =3a(2) =9a(3) =27a(4) =57a(5) =81a(6) =171a(7) =243a(8) =333a(9) =513a(10) =729a(11) =999a(12) =1083a(13) =1539a(14) =2187a(15) =2943a(16) =2997a(17) =3249a(18) =4617a(19) =6327a(20) =6561a(21) =8829a(22) =8991a(23) =9567a(24) =9747a(25) =12321a(26) =13851a(27) =18981a(28) =19683a(29) =20577