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 1-5 of 5 results.

A295355 Values of n for which pi_{24,13}(p_n) - pi_{24,1}(p_n) = -1, where p_n is the n-th prime and pi_{m,a}(x) is the number of primes <= x which are congruent to a (mod m).

Original entry on oeis.org

36826322708, 36826322724, 36826322769, 36826322776, 36826322790, 36826322804, 36826323283, 36826323287, 36826323293, 36826323310, 36826323320, 36826323340, 36826326663, 36826326763, 36826326784, 36826326786, 36826326812, 36826326824, 36826326834, 36826326849
Offset: 1

Views

Author

Andrey S. Shchebetov and Sergei D. Shchebetov, Dec 22 2017

Keywords

Comments

This is a companion sequence to A295356. The sequence (primes only, without exact n for the first and last terms as well as the number of terms) was found by Bays and Hudson in 1978 (see references). The full sequence up to 10^15 contains 6 sign-changing zones with 2381904 terms in total with A(2381904) = 21113714560133 as the last one.
We found the 7th sign-changing zone between 10^15 and 10^16. It starts with a(2381905) = 245086804685432, ends with a(2792591) = 245853749127075 and contains 410687 terms. - Andrey S. Shchebetov and Sergei D. Shchebetov, Apr 26 2019

A297449 Values of n for which pi_{24,17}(p_n) - pi_{24,1}(p_n) = -1, where p_n is the n-th prime and pi_{m,a}(x) is the number of primes <= x which are congruent to a (mod m).

Original entry on oeis.org

18687728175380, 18687728175387, 18687728175395, 18687728175515, 18687728175520, 18687728175587, 18687728175592, 18687728175626, 18687728175698, 18687728175707, 18687728175715, 18687728175726, 18687728175738, 18687728175762, 18687728176789, 18687728176820, 18687728176831, 18687728176844, 18687728176846, 18687728185530
Offset: 1

Views

Author

Andrey S. Shchebetov and Sergei D. Shchebetov, Jan 27 2018

Keywords

Comments

This is a companion sequence to A297450 and the first discovered for pi_{24,17}(p) - pi_{24,1}(p) prime race. The full sequence up to 10^15 contains 3 sign-changing zones with 963922 terms in total with A(963922) = 23241097440243 as the last one.

Crossrefs

A297450 Primes p for which pi_{24,17}(p) - pi_{24,1}(p) = -1, where pi_{m,a}(x) is the number of primes <= x which are congruent to a (mod m).

Original entry on oeis.org

617139273158713, 617139273159121, 617139273159337, 617139273163729, 617139273163793, 617139273165889, 617139273166121, 617139273167057, 617139273169273, 617139273169513, 617139273169729, 617139273170137, 617139273170401, 617139273171217, 617139273206009, 617139273206993, 617139273207449, 617139273207929, 617139273208001, 617139273504913
Offset: 1

Views

Author

Andrey S. Shchebetov and Sergei D. Shchebetov, Jan 27 2018

Keywords

Comments

This is a companion sequence to A297449 and the first discovered for pi_{24,17}(p) - pi_{24,1}(p) prime race. The full sequence up to 10^15 contains 3 sign-changing zones with 963922 terms in total with A(963922) = 772739867710897 as the last one.

Crossrefs

A298820 Values of n for which pi_{24,19}(p_n) - pi_{24,1}(p_n) = -1, where p_n is the n-th prime and pi_{m,a}(x) is the number of primes <= x which are congruent to a (mod m).

Original entry on oeis.org

21317046795798, 21317046796093, 21317046796102, 21317046796104, 21317046796154, 21317046796159, 21317046796172, 21317046796185, 21317046796193, 21317046796208, 21317046796212, 21317046796221, 21317046796226, 21317046796229, 21317046796240, 21317046796968, 21317046796986, 21317046796992, 21317046797002, 21317046797007
Offset: 1

Views

Author

Andrey S. Shchebetov and Sergei D. Shchebetov, Jan 27 2018

Keywords

Comments

This is a companion sequence to A298821 and the first discovered for pi_{24,19}(p) - pi_{24,1}(p) prime race. The full sequence up to 10^15 contains 5 sign-changing zones with 3436990 terms in total with A(3436990) = 23049274819456 as the last one.

Crossrefs

A298821 Primes p for which pi_{24,19}(p) - pi_{24,1}(p) = -1, where pi_{m,a}(x) is the number of primes <= x which are congruent to a (mod m).

Original entry on oeis.org

706866045116113, 706866045126361, 706866045126697, 706866045126907, 706866045128377, 706866045128563, 706866045128953, 706866045129163, 706866045129403, 706866045130057, 706866045130153, 706866045130459, 706866045130723, 706866045130771, 706866045131107, 706866045155113, 706866045155899, 706866045156043, 706866045156409, 706866045156499
Offset: 1

Views

Author

Andrey S. Shchebetov and Sergei D. Shchebetov, Jan 27 2018

Keywords

Comments

This is a companion sequence to A298820 and the first discovered for pi_{24,19}(p) - pi_{24,1}(p) prime race. The full sequence up to 10^15 contains 5 sign-changing zones with 3436990 terms in total with A(3436990) = 766164822666883 as the last one.

Crossrefs

Showing 1-5 of 5 results.