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 A173788 #5 Mar 30 2012 18:52:05 %S A173788 1,9,17,35,53,85,2,10,18,36,54,86,3,11,19,37,55,87,4,12,20,38,56,88, %T A173788 57,89,58,90,59,91,60,92,61,93,62,94,63,95,64,96,65,97,66,98,67,99,68, %U A173788 100,69,101,70,102,21,39,71,103,22,40,72,104,23,41,73,105,24,42,74,106,25 %N A173788 Nuclear charge numbers in Eric Scerri's periodic table of the elements read down columns. %C A173788 A permutation of the natural numbers from 1 to 116. %C A173788 The table has 32 columns and 6 rows: %C A173788 .H.He.Li.Be .B..C..N..O %C A173788 .F.Ne.Na.Mg Al.Si..P..S %C A173788 Cl.Ar..K.Ca .Sc.Ti..V.Cr.Mn.Fe.Co.Ni.Cu.Zn.Ga.Ge.As.Se %C A173788 Br.Kr.Rb.Sr ..Y.Zr.Nb.Mo.Tc.Ru.Rh.Pd.Ag.Cd.In.Sn.Sb.Te %C A173788 .I.Xe.Cs.Ba (La).Lu.Hf.Ta..W.Re.Os.Ir.Pt.Au.Hg.Tl.Pb.Bi.Po %C A173788 At.Rn.Fr.Ra (Ac).Lr.Rf.Db.Sg.Bh.Hs.Mt.Ds.RgUubUutUuqUupUUh %C A173788 The Lanthanides and Actinides are not expanded above. %C A173788 The first 4 columns contain 6 elements each, the next 14 columns (not detailed above) are the Lanthanides and Actinides, then there are 10 columns with 4 elements each and the final 4 columns with 6 each. %H A173788 Mark R. Leach, <a href="http://www.meta-synthesis.com/webbook/35_pt/pt_database.php">Eric Scerri's Triad Periodic Table</a> %e A173788 The first column is H (=1), F (=9), Cl (=17) down to At (=85). %Y A173788 Cf. A093907 %K A173788 nonn,fini,tabf,less %O A173788 1,2 %A A173788 _Paul Curtz_, Feb 24 2010