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 A171654 #25 Dec 12 2023 07:43:54 %S A171654 0,1,6,7,2,3,8,9,4,5,0,1,6,7,2,3,8,9,4,5,0,1,6,7,2,3,8,9,4,5,0,1,6,7, %T A171654 2,3,8,9,4,5,0,1,6,7,2,3,8,9,4,5,0,1,6,7,2,3,8,9,4,5,0,1,6,7,2,3,8,9, %U A171654 4,5,0,1,6,7,2,3,8,9,4,5,0,1,6,7,2,3,8,9,4,5 %N A171654 Period 10: repeat 0, 1, 6, 7, 2, 3, 8, 9, 4, 5. %C A171654 The repeating part contains all ten digits. %H A171654 <a href="/index/Rec#order_10">Index entries for linear recurrences with constant coefficients</a>, signature (0,0,0,0,0,0,0,0,0,1). %F A171654 a(n) = A171507(n+1) mod 10. %F A171654 a(2n) = A059629(n) mod 10; a(2n+1) = A139788(n). %F A171654 abs(a(n+1)-a(n)) = A010686(n). %F A171654 G.f.: -x*(1 + 6*x + 7*x^2 + 2*x^3 + 3*x^4 + 8*x^5 + 9*x^6 + 4*x^7 + 5*x^8) / ( (x-1)*(1+x)*(x^4 + x^3 + x^2 + x + 1)*(x^4 - x^3 + x^2 - x + 1) ). - _R. J. Mathar_, Jul 13 2011 %K A171654 nonn,easy %O A171654 0,3 %A A171654 _Paul Curtz_, Dec 14 2009 %E A171654 More terms from _Jinyuan Wang_, Feb 26 2020