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 A179477 #25 Jun 12 2025 08:34:57
%S A179477 10,99,988,9877,98766,987655,9876544,98765433,987654322,9876543211,
%T A179477 98765432100,987654320989,9876543209878,98765432098767,
%U A179477 987654320987656,9876543209876545,98765432098765434,987654320987654323,9876543209876543212,98765432098765432101
%N A179477 Antonym of A014824: each term is 10 times the previous term minus n.
%H A179477 Colin Barker, <a href="/A179477/b179477.txt">Table of n, a(n) for n = 0..998</a>
%H A179477 <a href="/index/Rec#order_03">Index entries for linear recurrences with constant coefficients</a>, signature (12,-21,10).
%F A179477 a(n) + A014824(n) = 10^(n+1).
%F A179477 From _Colin Barker_, Oct 03 2015: (Start)
%F A179477 a(n) = 12*a(n-1) - 21*a(n-2) + 10*a(n-3) for n>2.
%F A179477 G.f.: -(10*x^2-21*x+10) / ((x-1)^2*(10*x-1)). (End)
%F A179477 a(n) = (10 + 2^(5+n)*5^(2+n) + 9*n)/81. - _Colin Barker_, Mar 25 2017
%t A179477 Join[{a=10,b=99},Table[c=11*b-10*a-1;a=b;b=c,{n,60}]] (* _Vladimir Joseph Stephan Orlovsky_, Jan 20 2011*)
%t A179477 Join[{a=10}, Table[a=10a-n, {n,60}]] (* _T. D. Noe_, Jan 20 2011 *)
%o A179477 (PARI) Vec(-(10*x^2-21*x+10)/((x-1)^2*(10*x-1)) + O(x^30)) \\ _Colin Barker_, Oct 03 2015
%Y A179477 Cf. A014824.
%K A179477 nonn,easy
%O A179477 0,1
%A A179477 _Mark Dols_, Jul 16 2010