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.

A153262 Squares such that square+-3=primes.

Original entry on oeis.org

16, 64, 100, 196, 4096, 8464, 12544, 19600, 21316, 29584, 47524, 88804, 92416, 103684, 106276, 115600, 122500, 126736, 173056, 193600, 220900, 258064, 306916, 313600, 336400, 391876, 401956, 425104, 446224, 470596, 481636, 495616, 529984
Offset: 1

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Comments

16-3=13,16+3=19,primes; 64-3=61,64+3=67,primes;...
The squared members of the intersection of A028873 and A049422. [From R. J. Mathar, Jan 03 2009]

Crossrefs

Programs

  • Mathematica
    lst={};Do[p=n^2;If[PrimeQ[p-3]&&PrimeQ[p+3],AppendTo[lst,p]],{n,7!}];lst
    Select[Range[750]^2,And@@PrimeQ[#+{3,-3}]&] (* Harvey P. Dale, Dec 19 2012 *)