Numbers k that divide s(k), where s(1)=1, s(j)=11*s(j-1)+j.

Terms

a(0) =1a(1) =5a(2) =11a(3) =25a(4) =55a(5) =125a(6) =275a(7) =625a(8) =1375a(9) =3125a(10) =6875a(11) =15625a(12) =16105a(13) =34375a(14) =75025a(15) =78125a(16) =80525a(17) =171875a(18) =173767a(19) =177155a(20) =375125a(21) =390625a(22) =402625a(23) =603775a(24) =825275a(25) =859375a(26) =868835a(27) =885775a(28) =1391555a(29) =1875625