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All terms == 1 (mod 7). - Robert Israel, Jul 22 2014
m n = 2: mn^6 - mn^5 + mn^4 - mn^3 + mn^2 - m n + 1 = 43, which is prime.
m n = 10: mn^6 - mn^5 + mn^4 - mn^3 + mn^2 - m n + 1 = 909091, which is prime.
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All terms == 1 mod 7. - Robert Israel, Jul 22 2014
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K. D. Bajpai, <a href="/A245427/b245427.txt">Table of n, a(n) for n = 1..13520</a>
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Primes of the form n^6 - n^5 + n^4 - n^3 + n^2 - n + 1.
43, 547, 909091, 1623931, 7027567, 10678711, 15790321, 22796593, 32222107, 81867661, 183458857, 234750601, 574995877, 2498207293, 6177695707, 7095062437, 9272716111, 13564461457, 19397579293, 24344094727, 50689400581, 81420308971, 137405657593, 149289169177
1,1
All the terms in this sequence are primes, but none are congruent to 9 mod 10.
m = 2: m^6 - m^5 + m^4 - m^3 + m^2 - m + 1 = 43, which is prime.
m = 10: m^6 - m^5 + m^4 - m^3 + m^2 - m + 1 = 909091, which is prime.
Select[Table[n^6 - n^5 + n^4 - n^3 + n^2 - n + 1, {n, 200}], PrimeQ]
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K. D. Bajpai, Jul 21 2014
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