A263391 - OEIS

A263391

Sierpiński numbers that have at least two covering sets.

12151397, 31210219, 45181667, 56191673, 66887071, 68468753, 69169397, 71307347, 114921271, 122311103, 133228283, 152252267, 154337567, 182479909, 185282537, 192413177, 210465533, 220192013, 226521259, 235663343, 236281883, 253282909, 275248343, 282777829

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OFFSET

1,1

LINKS

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

Wikipedia, Sierpinski number

EXAMPLE

For every k >= 1, 12151397*2^k + 1 has a divisor in the set {3, 5, 7, 13, 19, 37, 73} and also in the set {3, 5, 7, 13, 19, 73, 109}. 12151397 is therefore in the sequence.

CROSSREFS

Cf. A076336, A263392.

Sequence in context: A206750 A178056 A132291 * A204888 A268418 A286301

Adjacent sequences: A263388 A263389 A263390 * A263392 A263393 A263394

KEYWORD

nonn

AUTHOR

Arkadiusz Wesolowski, Oct 16 2015

EXTENSIONS

2 terms inserted by Arkadiusz Wesolowski, Aug 28 2016

More terms from Arkadiusz Wesolowski, Jan 09 2018

STATUS

approved