This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A216130 #9 Aug 09 2025 09:07:41 %S A216130 7,49,343,2401,6807,7649,3543,4801,3607,5249,6743,7201,407,2849,9943, %T A216130 9601,7207,449,3143,2001,4007,8049,6343,4401,807,5649,9543,6801,7607, %U A216130 3249,2743,9201,4407,849,5943,1601,1207,8449,9143,4001,8007,6049,2343,6401,4807,3649,5543,8801,1607,1249,8743 %N A216130 7^n mod 10000. %C A216130 Period = 100. %H A216130 V. Raman, <a href="/A216130/b216130.txt">Table of n, a(n) for n = 1..100</a> %H A216130 <a href="/index/Rec#order_100">Index entries for linear recurrences with constant coefficients</a>, signature (0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1). %o A216130 (PARI) for(i=1, 100, print(7^i%10000" ")) %Y A216130 Cf. A001903, A014390. %K A216130 nonn,easy %O A216130 1,1 %A A216130 _V. Raman_, Sep 01 2012