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 A182133 Carmichael numbers of the form C = (30n-17)*(90n-53)*(150n-89). 1
 29341, 1152271, 34901461, 64377991, 775368901, 1213619761, 4562359201, 8346731851, 9293756581, 48874811311, 68926289491, 72725349421, 84954809611, 147523256371, 235081952731, 672508205281, 707161856941, 779999961061 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Note that in this sequence, 30n-17, 90n-53, and 150n-89 do not have to be prime. Conjecture: The number C = (30n+13)*(90n+37)*(150n+61) is a Carmichael number if (but not only if) 30n+13, 90n+37 and 150n+61 are all three prime numbers. The conjecture is checked for 01||(n-1)%(f[i, 1]-1), return(0))); 1 list(lim)=my(v=List(), C, n); while(n++ && (C=(30*n-17)*(90*n-53)*(150*n-89))<=lim, if(K(C, 30*n-17) && K(C, 90*n-53) && K(C, 150*n-89), listput(v, C))); Vec(v) \\ Charles R Greathouse IV, Jul 05 2017 CROSSREFS Sequence in context: A083740 A083739 A329538 * A182416 A232201 A251563 Adjacent sequences: A182130 A182131 A182132 * A182134 A182135 A182136 KEYWORD nonn AUTHOR Marius Coman, Apr 14 2012 EXTENSIONS a(13) inserted by Charles R Greathouse IV, Jul 05 2017 STATUS approved

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Last modified July 19 20:58 EDT 2024. Contains 374436 sequences. (Running on oeis4.)