a(n) is the smallest prime of the form 4k + 3 such that the first n iterations of the map p -> 4p + 3 are prime with the next iteration being composite.
A179767
a(n) is the smallest prime of the form 4k + 3 such that the first n iterations of the map p -> 4p + 3 are prime with the next iteration being composite.
Terms
- a(0) =3a(1) =19a(2) =7a(3) =179a(4) =1447a(5) =32059a(6) =55171a(7) =17231a(8) =32611a(9) =644823367a(10) =8870650619a(11) =10808693851a(12) =26813406071
External references
- oeis: A179767