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

1,18

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

Table of n, a(n) for n=1..35.

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

Crossrefs

Cf. A257647, A258154.

Sequence in context: A378653 A061859 A348250 * A287287 A323519 A333979

Adjacent sequences: A289107 A289108 A289109 * A289111 A289112 A289113

Keyword

nonn,more

Author

Arkadiusz Wesolowski, Jun 24 2017

Status

approved