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A323558
Numbers k such that n^2 + n + k has no prime factor p <= 41 for any integer n.
0
19421, 27941, 55661, 72491, 237761, 333491, 514037, 546587, 553997, 601037, 619517, 635807, 685667, 712421, 843497, 849701, 871457, 916031, 994907, 1024691, 1049297, 1084607, 1084997, 1103777, 1165181, 1196927, 1211291, 1240697, 1262201, 1292231, 1342037, 1376591, 1384907, 1438751, 1454897, 1462577, 1488647
OFFSET
1,1
COMMENTS
Observation: The terms tend to be primes but are not by any means all primes.
If k is a term, then k + A002110(13) = k + 304250263527210 is also a term.
It appears this sequence includes about 1/2918.52 of the positive integers.
CROSSREFS
Sequence in context: A031831 A252901 A126721 * A321642 A204592 A140930
KEYWORD
nonn
AUTHOR
Jason Atwood, Jan 17 2019
STATUS
approved