A237880 Conjectured number of distinct integers < 10^n that are Sierpiński or Riesel or simultaneously Sierpiński and Riesel numbers.

0, 0, 0, 0, 1, 16, 134, 1345, 13420

Offset: 1

Author

Arkadiusz Wesolowski, Feb 14 2014

Keywords

• nonn
• more

Links

• Wikipedia, Riesel number
• Wikipedia, Sierpinski number

Crossrefs

Cf. A076335, A076336, A076337, A101036, A236320, A236321.

Formula

a(n) = A236320(n) + A236321(n) for n <= 9.

Extensions

Definition clarified by Arkadiusz Wesolowski, Jun 05 2021