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%I #9 Sep 11 2018 11:03:40
%S 35,169,385,899,961,1121,2001,3107,4879,4901,5719,6215,6265,6441,6479,
%T 6601,7055,7801,8119,8339,9799,10403,10763,10945,13079,13601,15841,
%U 18241,19097,20833,20951,22499,24727,27839,29183,29953,30731,31417,31535,34561,37345
%N Composite numbers k such that Pell(k) == 1 (mod k).
%C It appears that most of the terms of A319040 (Numbers k such that Pell(k) == 1 (mod k)) are primes; this sequence lists the composites.
%C For the composite numbers k such that Pell(k) == -1 (mod k), see A319043.
%H Seiichi Manyama, <a href="/A319042/b319042.txt">Table of n, a(n) for n = 1..500</a>
%e k=35 is in the sequence: Pell(35) = 8822750406821 = 35*252078583052 + 1 == 1 (mod 35).
%e k=6 is not in the sequence: Pell(6) = 70 = 6*12 - 2 !== 1 (mod 6).
%Y Cf. A000129 (Pell numbers), A094394, A319040, A319041, A319043.
%K nonn
%O 1,1
%A _Jon E. Schoenfield_, Sep 08 2018
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