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A025018 Numbers n such that least prime in Goldbach partition of n increases. 12
4, 6, 12, 30, 98, 220, 308, 556, 992, 2642, 5372, 7426, 43532, 54244, 63274, 113672, 128168, 194428, 194470, 413572, 503222, 1077422, 3526958, 3807404, 10759922, 24106882, 27789878, 37998938, 60119912, 113632822, 187852862, 335070838 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Charles R Greathouse IV, Table of n, a(n) for n = 1..69 (from Tomás Oliveira e Silva)

Mark A. Herkommer, Goldbach Conjecture Research

Jorg Richstein, Verifying Goldbach's Conjecture up to 4 * 10^14

Index entries for sequences related to Goldbach conjecture

Tomás Oliveira e Silva, Goldbach conjecture verification

MATHEMATICA

p = 1; r = {}; Do[ k = 2; While[ !PrimeQ[k] || !PrimeQ[2n - k], k++ ]; If[k > p, p = k; r = Append[r, 2n]], {n, 2, 10^8}]; r

PROG

(PARI) Gold(n)=forprime(p=2, min(n\2, default(primelimit)), if(isprime(n-p), return(p)))

r=0; forstep(n=4, 1e6, 2, t=Gold(n); if(t>r, r=t; print1(n", "))) \\ Charles R Greathouse IV, Feb 21 2012

CROSSREFS

Cf. A001172, A025019.

Sequence in context: A056495 A263656 A178674 * A102043 A025017 A133427

Adjacent sequences:  A025015 A025016 A025017 * A025019 A025020 A025021

KEYWORD

nonn,nice

AUTHOR

David W. Wilson

EXTENSIONS

Edited and extended by Robert G. Wilson v, Dec 13 2002

STATUS

approved

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Last modified November 16 21:47 EST 2018. Contains 317275 sequences. (Running on oeis4.)