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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A071636 Numbers n=4*k+2 such that there is no pair of primes p and q of form 4*i+1 with p+q=n; A071635(n)=0.

Original entry on oeis.org

2, 6, 14, 38, 62
Offset: 1

Views

Author

Reinhard Zumkeller, May 27 2002

Keywords

Comments

Conjecture: there are no more terms.

Examples

			62=4*15+2 is a term, as p = 3 modulo 4 for all primes p in decompositions of 62 into sum of two primes: 3+59=11+51=19+43=31+31;
66=4*16+2 is not a term, as e.g. 66=5+61=(4*1+1)+(4*15+1): A071635(16)>0.

Links

Crossrefs

Cf. A002144, A002145.

A156643 Erroneous duplicate of A071635.

Original entry on oeis.org

0, 0, 1, 0, 1, 1, 1, 1, 2, 0, 2, 2, 1, 2, 3, 0, 3, 2, 2, 3, 2, 1, 3, 2, 1, 4, 3, 2, 5, 3, 2, 5, 4, 2, 3, 4, 2, 5, 4, 1, 5, 3, 3, 4, 4, 1, 6, 4, 3
Offset: 0

Views

Author

Sidney Cadot, Feb 18 2023

Keywords

Crossrefs

Cf. A071635.
Showing 1-2 of 2 results.

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

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