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.

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A141873 Primes congruent to 8 mod 19.

Original entry on oeis.org

103, 179, 293, 331, 521, 673, 787, 863, 977, 1091, 1129, 1319, 1433, 1471, 1699, 1889, 2003, 2269, 2383, 2459, 2687, 2801, 2953, 3067, 3181, 3257, 3371, 3637, 4093, 4283, 4397, 4549, 4663, 4967, 5081, 5119, 5233, 5309, 5347, 5651, 5689, 5879, 6221, 6373
Offset: 1

Views

Author

N. J. A. Sloane, Jul 11 2008

Keywords

Crossrefs

Programs

Formula

a(n) ~ 18n log n. - Charles R Greathouse IV, Jul 02 2016

A142126 Primes congruent to 17 mod 37.

Original entry on oeis.org

17, 239, 313, 461, 683, 757, 1201, 1423, 1571, 1867, 2089, 2237, 2311, 2459, 2903, 3347, 3643, 4013, 4457, 4679, 5197, 5419, 5641, 6011, 6529, 6899, 7121, 7417, 7639, 8009, 8231, 8527, 8971, 9341, 9859, 10007, 10303, 11117, 11783, 12227, 12301, 12671, 12893
Offset: 1

Views

Author

N. J. A. Sloane, Jul 11 2008

Keywords

Crossrefs

Programs

Formula

a(n) ~ 36n log n. - Charles R Greathouse IV, Jul 02 2016

A142216 Primes congruent to 19 mod 41.

Original entry on oeis.org

19, 101, 347, 593, 757, 839, 1249, 1741, 1823, 1987, 2069, 2971, 3217, 3299, 3463, 3709, 4201, 4283, 4447, 5021, 5431, 5923, 6661, 6907, 7481, 7727, 8219, 8629, 9203, 9613, 9859, 9941, 10433, 10597, 11171, 11827, 11909, 12073, 12401, 12647, 12893, 13877
Offset: 1

Views

Author

N. J. A. Sloane, Jul 11 2008

Keywords

Crossrefs

Cf. A000040, A144562. - Vincenzo Librandi, Jan 17 2009

Programs

Formula

a(n) ~ 40n log n. - Charles R Greathouse IV, Jul 02 2016

A163769 Primes p such that 2*p+3 is not prime.

Original entry on oeis.org

3, 11, 23, 31, 37, 41, 59, 61, 71, 79, 83, 101, 103, 107, 109, 131, 149, 151, 163, 179, 181, 191, 211, 233, 239, 241, 251, 257, 263, 271, 281, 293, 311, 313, 317, 331, 347, 359, 367, 373, 389, 401, 419, 421, 431, 433, 443, 449, 457, 461, 479, 491, 499, 521
Offset: 1

Views

Author

Vincenzo Librandi, Aug 04 2009

Keywords

Comments

All those p appear in A144562. [Proof: since 2p+3 is odd and not prime, it can be written as a product of two odd numbers, 2p+3=(2k+1)*(2s+1), therefore p=2ks+k+s-1. - R. J. Mathar, Aug 06 2009]

Examples

			3 is in the sequence because 2*3+3=9 is composite; 23 is in the sequence because 2*23+3=49 is composite.
		

Crossrefs

Cf. A144562.

Programs

  • Magma
    [p: p in PrimesUpTo(700) | not IsPrime(2*p+3)]; // Vincenzo Librandi, Apr 08 2013
  • Mathematica
    Select[Prime[Range[200]],!PrimeQ[2#+3]&] (* Harvey P. Dale, Feb 02 2012 *)

Formula

A153238 INTERSECT A000040. - R. J. Mathar, Aug 05 2009
A000040 \ A023204. - R. J. Mathar, Aug 05 2009

Extensions

Entries checked - R. J. Mathar, Aug 06 2009

A142018 Primes congruent to 14 mod 31.

Original entry on oeis.org

107, 293, 479, 541, 727, 1223, 1409, 1471, 1657, 2029, 2153, 2339, 2711, 2897, 3083, 3331, 3517, 3889, 4013, 4261, 4447, 4943, 5501, 5563, 5749, 6121, 6679, 6803, 7237, 7547, 7919, 8167, 8291, 8353, 8539, 8663, 8849, 9221, 9283, 10151, 10337, 10399, 10709
Offset: 1

Views

Author

N. J. A. Sloane, Jul 11 2008

Keywords

Crossrefs

Programs

Formula

a(n) ~ 30n log n. - Charles R Greathouse IV, Jul 02 2016

A154621 Primes congruent to 32 mod 67.

Original entry on oeis.org

233, 367, 769, 1171, 1439, 2243, 2377, 3181, 3449, 3583, 3851, 4253, 4789, 5861, 6263, 6397, 7603, 8273, 9479, 9613, 11087, 11489, 12829, 13499, 13633, 13901, 14303, 14437, 15107, 15241, 15643, 16447, 17117, 17519, 17921, 18457, 18859
Offset: 1

Views

Author

Vincenzo Librandi, Jan 17 2009

Keywords

Crossrefs

Cf. A144562.

Programs

Formula

a(n) ~ 66n log n. - Charles R Greathouse IV, Jul 02 2016

Extensions

Edited by N. J. A. Sloane, Jun 23 2010

A154624 Primes congruent to 34 mod 71.

Original entry on oeis.org

389, 673, 1667, 1951, 2377, 2803, 3229, 3371, 3797, 4507, 4649, 4933, 5501, 5927, 6211, 6353, 6637, 6779, 7489, 9619, 10613, 12601, 12743, 13879, 14447, 14731, 15299, 15583, 17713, 19417, 19559, 19843, 20269, 20411, 21121, 22541, 23251
Offset: 1

Views

Author

Vincenzo Librandi, Jan 17 2009

Keywords

Comments

Prime numbers that belong to the 35th column of A144562.

Crossrefs

Programs

Formula

a(n) ~ 70n log n. - Charles R Greathouse IV, Jul 02 2016

A141935 Primes congruent to 11 mod 25.

Original entry on oeis.org

11, 61, 211, 311, 461, 661, 761, 811, 911, 1061, 1361, 1511, 1811, 1861, 2011, 2111, 2161, 2311, 2411, 2711, 2861, 3011, 3061, 3361, 3461, 3511, 3761, 3911, 4111, 4211, 4261, 4561, 4861, 5011, 5261, 5711, 5861, 6011, 6211, 6311, 6361, 6661, 6761, 6911, 6961
Offset: 1

Views

Author

N. J. A. Sloane, Jul 11 2008

Keywords

Crossrefs

Cf. A144562.

Programs

Formula

a(n) ~ 20n log n. - Charles R Greathouse IV, Jul 02 2016

A142269 Primes congruent to 20 mod 43.

Original entry on oeis.org

149, 751, 1009, 1181, 1439, 1697, 1783, 2213, 2557, 2729, 3331, 3761, 3847, 4019, 4363, 4621, 4793, 5051, 5309, 5653, 6427, 6599, 6857, 7459, 7717, 8147, 8233, 8663, 9007, 9437, 9781, 10039, 10211, 11071, 11243, 11329, 11587, 12619, 12791, 13049, 14081
Offset: 1

Views

Author

N. J. A. Sloane, Jul 11 2008

Keywords

Crossrefs

Programs

Formula

a(n) ~ 42n log n. - Charles R Greathouse IV, Jul 02 2016

A142373 Primes congruent to 22 mod 47.

Original entry on oeis.org

163, 257, 727, 821, 1009, 1103, 1291, 1667, 1949, 2137, 3359, 3547, 3923, 4111, 4957, 5051, 5333, 5521, 5897, 6367, 7213, 7307, 7589, 8059, 8623, 8999, 9187, 9281, 10597, 10691, 10973, 11161, 11443, 12007, 12101, 12289, 12853, 13229, 13417, 14639, 14827
Offset: 1

Views

Author

N. J. A. Sloane, Jul 11 2008

Keywords

Crossrefs

Programs

Formula

a(n) ~ 46n log n. - Charles R Greathouse IV, Jul 03 2016
Previous Showing 11-20 of 33 results. Next