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%I #20 Dec 07 2019 12:18:25
%S 0,1,15,169,1695,15961,26846,450066,5247614,13156907,226316077,
%T 680627620,13354327932,65310761853,328708074010,1951441519231,
%U 15611532153848,158125187800385,101848932467045,7328445851378156,35829776440278962,286638211522231696
%N a(n) = 8^n mod 7^n.
%H Seiichi Manyama, <a href="/A138973/b138973.txt">Table of n, a(n) for n = 0..1183</a>
%o (Sage) [power_mod(8,n,7^n) for n in range(0,22)] # _Zerinvary Lajos_, Nov 28 2009
%o (PARI) a(n) = if (n, lift(Mod(8, 7^n)^n), 0); \\ _Michel Marcus_, Feb 20 2018
%Y Cf. k^n mod (k-1)^n: A002380 (k=3), A064629 (k=4), A138589 (k=5), A138649 (k=6), A139786 (k=7), this sequence (k=8), A139733 (k=9).
%Y Cf. A000420, A001018.
%K nonn
%O 0,3
%A _N. J. A. Sloane_, May 20 2008
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