Second-smallest prime factor of the n-th Lucas number (beginning with 2), if composite, or 1 otherwise.

A194086

Second-smallest prime factor of the n-th Lucas number (beginning with 2), if composite, or 1 otherwise.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =2a(4) =1a(5) =1a(6) =3a(7) =1a(8) =1a(9) =19a(10) =41a(11) =1a(12) =7a(13) =1a(14) =281a(15) =11a(16) =1a(17) =1a(18) =3a(19) =1a(20) =2161a(21) =29a(22) =43a(23) =461a(24) =47a(25) =101a(26) =90481a(27) =19a(28) =14503a(29) =19489

External references