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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 (list; graph; refs; listen; history; text; internal format)
 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. LINKS Table of n, a(n) for n=1..37. CROSSREFS Sequence in context: A031831 A252901 A126721 * A321642 A204592 A140930 Adjacent sequences: A323555 A323556 A323557 * A323559 A323560 A323561 KEYWORD nonn AUTHOR Jason Atwood, Jan 17 2019 STATUS approved

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Last modified September 25 23:09 EDT 2023. Contains 365649 sequences. (Running on oeis4.)