The On-Line Encyclopedia of Integer Sequences (OEIS)

A304904 revision #2

A304904

Greatest prime p such that 2*n^2 - p is prime.

5, 13, 29, 47, 67, 79, 109, 157, 197, 239, 283, 331, 389, 443, 509, 571, 643, 719, 797, 877, 937, 1051, 1129, 1237, 1321, 1453, 1549, 1669, 1789, 1879, 2029, 2161, 2309, 2447, 2579, 2731, 2857, 3037, 3187, 3359, 3517

(list; graph; refs; listen; history; text; internal format)

OFFSET

2,1

LINKS

Table of n, a(n) for n=2..42.

CROSSREFS

Cf. A304874, A204875, A304903, A304905.

Sequence in context: A130066 A206258 A270106 * A095085 A309371 A230281

Adjacent sequences: A304901 A304902 A304903 * A304905 A304906 A304907

KEYWORD

nonn

AUTHOR

Hugo Pfoertner, May 20 2018

STATUS

editing