A289110 a(n) = number of covering sets of modulus 2*n for Sierpiński/Riesel numbers.

0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 4, 0, 0, 0, 0, 0, 15, 0, 0, 0, 0, 0, 23, 0, 1, 0, 0, 0

Offset: 1

Author

Arkadiusz Wesolowski, Jun 24 2017

Keywords

• nonn
• more

Comments

a(36) >= 93.

Note that it is not true that a(n) = 0 unless n is a multiple of 6. For example, a(40) = 1.

Links

• Yves Gallot, A search for some small Brier numbers, 2000.

Crossrefs

Cf. A257647, A258154.