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A349028 Lucas-Carmichael numbers with 9 prime factors. 3

%I #16 Aug 28 2022 14:59:51

%S 14563696180319,16569718534655,20203946790335,22034564147519,

%T 23315834862719,23889526894079,27074874805055,28932092649215,

%U 31534433588735,34236981827279,34249223161439,45373136257295,45593377151399,50103079391519,50415330959279,50683388926247

%N Lucas-Carmichael numbers with 9 prime factors.

%H Daniel Suteu, <a href="/A349028/b349028.txt">Table of n, a(n) for n = 1..14207</a> (all terms < 10^17).

%e 14563696180319 = 11*13*17*23*29*41*47*59*79 and 12, 14, 18, 24, 30, 42, 48, 60, and 80 all divide 14563696180320.

%o (PARI) is(n)={omega(n)==9&&is_A006972(n)}

%Y Intersection of A006972 and A046312.

%Y Cf. A216928 (least Lucas-Carmichael number with n prime factors).

%Y Cf. A216925, A216926, A216927, A217002, A217003, A217091, A349029, A349030 (Lucas-Carmichael numbers with 3-8, 10 and 11 prime factors).

%K nonn

%O 1,1

%A _Tim Johannes Ohrtmann_, Nov 06 2021

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Last modified August 16 11:02 EDT 2024. Contains 375174 sequences. (Running on oeis4.)