A263392 Riesel numbers that have at least two covering sets.

66837283, 68026001, 71344361, 71604733, 74477159, 94270439, 97579567, 122606647, 140022313, 153196541, 170969579, 182720077, 198885523, 211327993, 220316413, 227116031, 280536071, 285155137, 290419777, 292202437, 293175191, 309240779, 324576431, 331006603

Offset

1,1

Links

Table of n, a(n) for n=1..24.

Wikipedia, Riesel number

Example

For every k >= 1, 97579567*2^k - 1 has a divisor in the set {3, 5, 7, 13, 17, 241} and also in the set {3, 5, 13, 17, 97, 241, 257}. 97579567 is therefore in the sequence.

Crossrefs

Cf. A101036, A263391.

Sequence in context: A184215 A151697 A138085 * A011576 A089081 A161774

Adjacent sequences: A263389 A263390 A263391 * A263393 A263394 A263395

Keyword

nonn

Author

Arkadiusz Wesolowski, Oct 16 2015

Extensions

1 term inserted by Arkadiusz Wesolowski, Aug 28 2016

More terms from Arkadiusz Wesolowski, Jan 09 2018

Status

approved