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 A336716 #15 Aug 16 2020 12:56:44 %S A336716 1,2,3,5,8,13,4,7,11,20,21,30,31,40,41,50,51,6,70,71,80,81,9,10,12,32, %T A336716 52,72,90,91,101,14,53,82,102,22,42,60,61,73,103,33,62,83,110,15,63, %U A336716 92,111,23,54,93,120,24,64,104,43,74,112,34,75,121,35,84,122,44,85,130,36,94,131,45,95,140,46,105,55,106 %N A336716 Lexicographically earliest sequence of distinct positive integers such that the sum of the last two digits of the sequence starts the new term. %C A336716 No term ending with two or more zeros is part of the sequence as the next term would start with zero. %H A336716 Jean-Marc Falcoz, <a href="/A336716/b336716.txt">Table of n, a(n) for n = 1..10002</a> %e A336716 5 + 8 = 13; now the last two digits of the sequence are 1 and 3; their sum is 4; the last two digits of the sequence are now 3 and 4; their sum is 7; the last two digits are now 4 and 7 with sum 11; those two digits sum up to 2 but as 2 is already in the sequence we extend it with 20 as 20 is the smallest integer starting with the sum 2 that is not yet in the sequence. %Y A336716 Cf. A209685. %K A336716 base,nonn %O A336716 1,2 %A A336716 _Eric Angelini_ and _Jean-Marc Falcoz_, Aug 01 2020