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 A137937 #8 Apr 18 2013 06:34:16 %S A137937 0,0,3,4,5,6,7,8,9,10,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34, %T A137937 35,36,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75, %U A137937 76,77,78,79,80,81,82,83,84,85,86 %N A137937 A137904(n) - A137575(n). %C A137937 To have 0 upon vertical 2, 10, 18, 36, 54, 86 (noble gases) is not a problem (with the help of A137583. A (second) 0 upon 1, 3, 11, 19, 37, 55, 87 (alkali metals), seems paradoxal. Is 120 terms (elements) sequence 0, 0, 1, 2, .. 117, 118 credible? This leads to a row 0 (0 upon hydrogen, 0 upon helium). Two common points with Janet periodic table elements. %C A137937 60 terms: another, with A137913, theoritical companion to A137904. %F A137937 A137913 prepended with 0, 0. %Y A137937 Cf. A134984, A137575, A137904. %K A137937 nonn,fini,full %O A137937 0,3 %A A137937 _Paul Curtz_, Apr 30 2008