cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

Showing 1-4 of 4 results.

A020230 Strong pseudoprimes to base 4.

Original entry on oeis.org

341, 1387, 2047, 3277, 4033, 4371, 4681, 5461, 8321, 8911, 10261, 13747, 14491, 15709, 15841, 19951, 29341, 31621, 42799, 49141, 49981, 52633, 60787, 65077, 65281, 74665, 80581, 83333, 85489, 88357, 90751, 104653, 123251, 129921, 130561, 137149
Offset: 1

Views

Author

David W. Wilson

Keywords

Links

Crossrefs

Cf. A020136 (base 4), A001262 (base 2), A020229 (base 3), A020231 (base 5), A020232 (base 6), A020233 (base 7), A020234 (base 8), A020235 (base 9), A020236 (base 10), A020237 (base 11), A020238 (base 12).

A020238 Strong pseudoprimes to base 12.

Original entry on oeis.org

91, 133, 145, 247, 1649, 1729, 2821, 8911, 9073, 10585, 13051, 13333, 16471, 19517, 20737, 21361, 24013, 24727, 26467, 29539, 31483, 31621, 34219, 34861, 35881, 38311, 38503, 40321, 53083, 67861, 79381, 79501, 88831, 97351, 115231, 121301, 131977
Offset: 1

Views

Author

David W. Wilson

Keywords

Links

Crossrefs

Cf. A020140, A001262 (base 2), A020229 (base 3), A020230, A020231, A020232, A020233, A020234, A020235, A020236, A020237.

A188755 Strong pseudoprimes to bases 11, 13 and 17.

Original entry on oeis.org

10267951, 38248981, 39547171, 54637831, 123771511, 264350521, 284166877, 317712877, 585281791, 842220289, 1480849831, 2144961253, 2385076987, 3256366051, 3363763231, 3383477191, 3637831753, 4042578403, 5541525331
Offset: 1

Views

Author

R. J. Mathar, Apr 09 2011, Mar 08 2012

Keywords

Comments

Intersection of A020237, A020239 and A020243.

Links

Crossrefs

Cf. A074773.

A209395 Strong pseudoprimes to bases 19, 23 and 29.

Original entry on oeis.org

4224533, 5903497, 16462297, 22028203, 44068001, 336273211, 1067437801, 1813073653, 1876485691, 1894909141, 2072488771, 2458231903, 2791053541, 2827961221, 3733646491, 4333572253
Offset: 1

Views

Author

R. J. Mathar, Mar 07 2012

Keywords

Comments

Intersection of A020245, A020249 and A020255.

Crossrefs

Cf. A074773, A188755.

Programs

Showing 1-4 of 4 results.

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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