Largest prime factor of 11^n - 1.

Terms

a(0) =5a(1) =5a(2) =19a(3) =61a(4) =3221a(5) =37a(6) =45319a(7) =7321a(8) =1772893a(9) =13421a(10) =1806113a(11) =1117a(12) =3158528101a(13) =1623931a(14) =195019441a(15) =6304673a(17) =1772893a(19) =212601841a(20) =45319a(21) =1806113a(23) =20113a(25) =3158528101