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 A138098 #4 Mar 30 2012 18:51:57 %S A138098 2,1,10,9,8,7,6,5,4,3,18,17,16,15,14,13,12,11,36,35,34,33,32,31,30,29, %T A138098 28,27,26,25,24,23,22,21,20,19,54,53,52,51,50,49,48,47,46,45,44,43,42, %U A138098 41,40,39,38,37,86,85,84,83,82,81,80,79,78,77,76,75,74,73,72,71,70,69,68,67,66,65,64,63,62,61,60,59,58,57,56,55,118,117,116,115,114,113,112,111,110,109,108 %N A138098 The Mendeleyev-Seaborg periodic table read from right to left (with spaces omitted). %C A138098 A permutation of the numbers 1 to 118. %C A138098 Comparing this with A138096, it looks as if the last row was not reversed. Is this an error? - _N. J. A. Sloane_, May 06 2008 %Y A138098 Cf. A138096. %K A138098 nonn %O A138098 1,1 %A A138098 _Paul Curtz_, May 03 2008