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 1-3 of 3 results.

A096630 Numbers n for which the set of first n primes (mod 3) is biased towards 1.

Original entry on oeis.org

23338590792, 23338590794, 23338590795, 23338590796, 23338590797, 23338590798, 23338590800, 23338590801, 23338590802, 23338590803, 23338590804, 23338590810, 23338590811, 23338590812, 23338590813
Offset: 1

Views

Author

Eric W. Weisstein, Jul 01 2004

Keywords

Comments

Indices of negative terms in A112632. - Jianing Song, Feb 20 2019

Crossrefs

Extensions

Edited by Max Alekseyev, Sep 13 2009

A297005 Values of n for which pi_{3,2}(p_n) - pi_{3,1}(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

23338590792, 23338590794, 23338590796, 23338590798, 23338590800, 23338590802, 23338590804, 23338590810, 23338590814, 23338590816, 23338590818, 23338590832, 23338591016, 23338591018, 23338591028, 23338591030, 23338591032, 23338591084, 23338591086, 23338591088, 23338591302, 23338591340, 23338591342, 23338591344, 23338591346, 23338591348, 23338591350, 23338591656, 23338591658, 23338591662
Offset: 1

Views

Author

Andrey S. Shchebetov and Sergei D. Shchebetov, Dec 23 2017

Keywords

Comments

This sequence is a companion sequence to A297006. Starting from a(20591)=216415270060 the sequence includes the second sign-changing zone predicted by C. Bays et al. in 2001. The sequence with the first two sign-changing zones up to 10^13 contains 84323 terms with a(84323)=216682882512 as its last term (see b-file). In addition, a(1) = A096630(1).

Crossrefs

A306891 Primes p for which pi_{3,2}(p) < pi_{3,1}(p), where pi_{m,a}(x) is the number of primes <= x which are congruent to a (mod m).

Original entry on oeis.org

608981813029, 608981813137, 608981813191, 608981813261, 608981813269, 608981813273, 608981813311, 608981813347, 608981813357, 608981813449, 608981813459, 608981813683, 608981813701, 608981813707, 608981813711, 608981813717, 608981813719, 608981813777, 608981813779
Offset: 1

Views

Author

Jianing Song, Mar 16 2019

Keywords

Comments

Primes p such that Sum_{primes q <= p} Kronecker(-3,q) > 0.
Indices of negative terms in A321856. See also the comment about Chebyshev's bias in A321856.

Crossrefs

Programs

  • PARI
    my(i=0); forprime(p=608981813029, 608981820000, i+=kronecker(-3, p); if(i>0, print1(p, ", ")))

Formula

a(n) = prime(A096630(n)).
Showing 1-3 of 3 results.