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 A144468 #22 Apr 16 2024 22:53:51
%S A144468 0,7,4,1,8,5,2,9,6,3,0,7,4,1,8,5,2,9,6,3,0,7,4,1,8,5,2,9,6,3,0,7,4,1,
%T A144468 8,5,2,9,6,3,0,7,4,1,8,5,2,9,6,3,0,7,4,1,8,5,2,9,6,3,0,7,4,1,8,5,2,9,
%U A144468 6,3,0,7,4,1,8,5,2,9,6,3,0,7,4,1,8,5,2,9,6,3,0,7,4,1,8,5
%N A144468 Final digit of multiples of 7.
%C A144468 Period 10: repeat [0, 7, 4, 1, 8, 5, 2, 9, 6, 3]. The ten digits by jumps of three terms or a(3n). Also reverse of A131579(n+1), n =1..10, repeated.
%H A144468 <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 A144468 a(n) = 7*n (mod 10) = -3*n (mod 10), n >= 0. See the name.
%F A144468 a(n+10) = a(n). - _Wesley Ivan Hurt_, Apr 16 2024
%t A144468 Table[Last[IntegerDigits[7n]], {n, 0, 98}] (* _Alonso del Arte_, Feb 06 2014 *)
%t A144468 Mod[7*Range[0,100],10] (* or *) PadRight[{},100,{0,7,4,1,8,5,2,9,6,3}] (* _Harvey P. Dale_, Jul 28 2017 *)
%o A144468 (PARI) a(n)=7*n%10 \\ _Charles R Greathouse IV_, Jun 02 2011
%Y A144468 Cf. A131579.
%K A144468 nonn,easy,base
%O A144468 0,2
%A A144468 _Paul Curtz_, Oct 09 2008