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 A098751 #8 Jan 02 2014 19:55:02 %S A098751 0,10,29,38,47,56,65,74,83,92,101,129,147,165,183,201,228,246,264,282, %T A098751 300,327,345,363,381,399,408,426,444,462,480,498,507,525,543,561,579, %U A098751 588,597,606,624,642,660,678,687,696,705,723,741,759,768,777,786,795 %N A098751 a(n+1) = a(n) + 10's complement of each of the digits of a(n); a(0) = 0. %C A098751 0 -> 10 because 0 + (10 - 0) = 10; 10 -> 29 because 10 + [(10 - 1) + (10 - 0)] = 29; 29 -> 38 because 19 + [(10 - 1) + (10 - 9)] = 38; ... %H A098751 Harvey P. Dale, <a href="/A098751/b098751.txt">Table of n, a(n) for n = 0..1000</a> %t A098751 NestList[Total[10-IntegerDigits[#]]+#&,0,60] (* _Harvey P. Dale_, Jan 02 2014 *) %Y A098751 Cf. A004207, A098750. %K A098751 base,easy,nonn %O A098751 0,2 %A A098751 _Eric Angelini_, Oct 01 2004 %E A098751 More terms from _Sam Alexander_, Jan 06 2005