Composite numbers not divisible by 7 which in base 7 contain their largest proper factor as a substring.

A063877

Composite numbers not divisible by 7 which in base 7 contain their largest proper factor as a substring.

Terms

    a(0) =551a(1) =989a(2) =1333a(3) =1363a(4) =5429a(5) =20081a(6) =26167a(7) =28381a(8) =28577a(9) =29719a(10) =60803a(11) =139163a(12) =147733a(13) =150047a(14) =161647a(15) =217103a(16) =224437a(17) =262921a(18) =293921a(19) =298007a(20) =302387a(21) =312913a(22) =342103a(23) =345127a(24) =385937a(25) =436129a(26) =508309a(27) =509189a(28) =539647a(29) =829921

External references