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A289983 Primes of the form 3^k - 32. 1

%I #12 Nov 12 2023 16:37:51

%S 211,6529,387420457,10460353171,834385168331080533771857328695251,

%T 11972515182562019788602740026717047105649,

%U 228532044137599177017869183161846685251274404207185590172004697234871412029099114058771

%N Primes of the form 3^k - 32.

%H Robert Price, <a href="/A289983/b289983.txt">Table of n, a(n) for n = 1..8</a>

%H F. Firoozbakht and M. F. Hasler, <a href="https://cs.uwaterloo.ca/journals/JIS/VOL13/Hasler/hasler2.html">Variations on Euclid's formula for Perfect Numbers</a>, JIS 13 (2010) #10.3.1.

%H Henri and Renaud Lifchitz, <a href="http://www.primenumbers.net/prptop">PRP Records</a>

%H OpenPFGW Project, <a href="http://sourceforge.net/projects/openpfgw/">Primality Tester</a>

%F a(n) = 3^A219049(n) - 32. - _Elmo R. Oliveira_, Nov 12 2023

%t Select[Table[3^k - 32], {k, 4, 100}], PrimeQ[#] &]

%Y Cf. A000040, A219049 (corresponding k's).

%K nonn

%O 1,1

%A _Robert Price_, Sep 02 2017

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Last modified July 13 16:37 EDT 2024. Contains 374284 sequences. (Running on oeis4.)