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.

A082312 Half the difference between start and center prime of the smallest [2n+1]-balanced prime set (A082080).

Original entry on oeis.org

1, 4, 5, 14, 11, 14, 12, 15, 32, 36, 32, 30, 41, 65, 42, 41, 53, 45, 75, 76, 69, 63, 99, 98, 60, 112, 99, 84, 94, 130, 132, 103, 87, 140, 172, 175, 144, 190, 171, 140, 200, 145, 203, 190, 155, 168, 202, 210, 144, 157, 254, 185, 189, 306, 201, 323, 303, 229, 267
Offset: 1

Views

Author

Ralf Stephan, Apr 09 2003

Keywords

Examples

			The smallest 5-balanced prime, 79 (center of 71,73,79,83,89) minus 8 is 71, so a(2)=8/2=4.
		

Crossrefs

Programs

  • PARI
    for(n=1, 80, i=2*n+1; f=0; forprime(p=2, 10^7, s=0; c=i; pr=p-1; t=0; while(c>0, c=c-1; pr=nextprime(pr+1); s=s+pr; if(c==(i-1)/2, t=pr)); if(s/i==t, print1((t-p)/2", "); f=1; break)); if(!f, print1("0, ")))