Smallest nonnegative integer k such that k^2 + 1 has exactly n distinct prime factors.
A180278
Smallest nonnegative integer k such that k^2 + 1 has exactly n distinct prime factors.
Terms
- a(0) =0a(1) =1a(2) =3a(3) =13a(4) =47a(5) =447a(6) =2163a(7) =24263a(8) =241727a(9) =2923783a(10) =16485763a(11) =169053487a(12) =4535472963a(13) =36316463227a(14) =879728844873
External references
- oeis: A180278