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 A228541 Numbers having at least one prime factor of the form 30*k + 1. 1
 31, 61, 62, 93, 122, 124, 151, 155, 181, 183, 186, 211, 217, 241, 244, 248, 271, 279, 302, 305, 310, 331, 341, 362, 366, 372, 403, 421, 422, 427, 434, 453, 465, 482, 488, 496, 527, 541, 542, 543, 549, 558, 571, 589, 601, 604, 610, 620, 631, 633, 651, 661, 662 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Together with 2, supersequence of A228556. LINKS EXAMPLE 183 = 3*61 is in the sequence because 30*2 + 1 is prime. 211 is in the sequence because it is prime and 211 = 30*7 + 1. PROG (PARI) for(n=31, 662, if(setsearch(Set(factor(n)[, 1]%30), 1)==1, print1(n, ", "))); CROSSREFS Supersequence of A132230. Cf. A228556. Sequence in context: A108293 A316349 A063339 * A115833 A189556 A185934 Adjacent sequences:  A228538 A228539 A228540 * A228542 A228543 A228544 KEYWORD nonn,less AUTHOR Arkadiusz Wesolowski, Aug 25 2013 STATUS approved

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Last modified October 19 21:28 EDT 2019. Contains 328244 sequences. (Running on oeis4.)