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 1-2 of 2 results.

A154501 Sum of any 3 consecutive numbers is prime and a(n+2)-(a(n+1)+a(n)) is prime, a(1)=3,a(2)=11.

Original entry on oeis.org

3, 11, 17, 31, 41, 59, 97, 113, 127, 139
Offset: 1

Views

Author

Keywords

Comments

3+11+17=31;17-(3+11)=3,...

Crossrefs

Programs

  • Mathematica
    a=3;b=11;lst={a,b};Do[c=Prime[n];p1=c+a+b;p2=c-(a+b);If[PrimeQ[p1]&&PrimeQ[p2],AppendTo[lst,c];a=b;b=c],{n,5,9!}];lst

Extensions

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

A154502 Sum of any 3 consecutive numbers is prime and a(n+2)-(a(n+1)+a(n)) is prime, a(1)=3,a(2)=31.

Original entry on oeis.org

3, 31, 37, 71, 89, 157, 163
Offset: 1

Views

Author

Keywords

Comments

3+31+37=71;37-(3+31)=3,...

Crossrefs

Programs

  • Mathematica
    a=3;b=31;lst={a,b};Do[c=Prime[n];p1=c+a+b;p2=c-(a+b);If[PrimeQ[p1]&&PrimeQ[p2],AppendTo[lst,c];a=b;b=c],{n,9,9!}];lst

Extensions

NAME adapted to offset. - R. J. Mathar, Jun 19 2021
Showing 1-2 of 2 results.