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.

A154484 a(n+1)-+a(n) = prime, a(1)=0, a(2)=2.

Original entry on oeis.org

0, 2, 5, 8, 11, 18, 23, 30, 37, 42, 47, 50, 53, 56, 75, 82, 85, 88, 91, 102, 109, 114, 119, 122, 129, 134, 137, 140, 143, 150, 157, 160, 171, 176, 183, 190, 193, 196, 201, 208, 211, 222, 227, 230, 233, 246, 253, 256, 267, 274, 297, 302, 305, 308, 311, 330, 343
Offset: 1

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Comments

Sum and difference of any of two consecutive numbers are prime numbers: 5-2=3; 5+2=7, 230-227=3; 230+227=457, 233-230=3; 233+230=463,...
I assume that here and in most of the similar sequences from the same author there is an implicit assumption that we want the "Lexicographically earliest infinite sequence of distinct positive numbers" that satisfies the stated condition. - N. J. A. Sloane, Apr 20 2022

Programs

  • Mathematica
    a=0;b=2;lst={a,b};Do[If[PrimeQ[n-b]&&PrimeQ[n+b],AppendTo[lst,n];a=b;b=n],{n,3,7!}];lst

Extensions

NAME adapted to offset. - R. J. Mathar, Jun 19 2021