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A116206 Primes of the form n^2 + n + 55661, with n >= 0. 3
55661, 55663, 55667, 55673, 55681, 55691, 55717, 55733, 55793, 55817, 55843, 55871, 55901, 55933, 55967, 56003, 56041, 56081, 56123, 56167, 56311, 56417, 56473, 56531, 56591, 56783, 56921, 56993, 57143, 57221, 57301, 57383, 57467 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

n^2+n+55661 is the first or second most efficient formula for finding primes until we get to n^2+n+154001 (competitors are n^2+n+41, n^2+n+55661, n^2+n+41537, n^2+n+27941, n^2+n+21377, ...)

LINKS

Table of n, a(n) for n=1..33.

CROSSREFS

Cf. A005846.

Sequence in context: A217692 A061740 A184094 * A251778 A203866 A205093

Adjacent sequences:  A116203 A116204 A116205 * A116207 A116208 A116209

KEYWORD

nonn

AUTHOR

Douglas Winston (douglas.winston(AT)srupc.com), Apr 14 2007

STATUS

approved

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Last modified September 15 12:44 EDT 2019. Contains 327078 sequences. (Running on oeis4.)