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 A194859 #5 Mar 30 2012 18:57:44 %S A194859 1,2,1,3,2,1,3,2,1,4,3,2,5,1,4,3,6,2,5,1,4,7,3,6,2,5,1,4,7,3,6,2,5,1, %T A194859 8,4,7,3,6,2,9,5,1,8,4,7,3,10,6,2,9,5,1,8,4,7,3,10,6,2,9,5,1,8,4,11,7, %U A194859 3,10,6,2,9,5,12,1,8,4,11,7,3,10,6,13,2,9,5,12,1,8,4,11,7,14,3 %N A194859 Triangular array (and fractal sequence): row n is the permutation of (1,2,...,n) obtained from the increasing ordering of fractional parts {e}, {2e}, ..., {ne}. %C A194859 See A194832 for a general discussion. %e A194859 First nine rows: %e A194859 1 %e A194859 2 1 %e A194859 3 2 1 %e A194859 3 2 1 4 %e A194859 3 2 5 1 4 %e A194859 3 6 2 5 1 4 %e A194859 7 3 6 2 5 1 4 %e A194859 7 3 6 2 5 1 8 4 %e A194859 7 3 6 2 9 5 1 8 4 %t A194859 r = E; %t A194859 t[n_] := Table[FractionalPart[k*r], {k, 1, n}]; %t A194859 f = Flatten[Table[Flatten[(Position[t[n], #1] &) /@ %t A194859 Sort[t[n], Less]], {n, 1, 20}]] (* A194859 *) %t A194859 TableForm[Table[Flatten[(Position[t[n], #1] &) /@ %t A194859 Sort[t[n], Less]], {n, 1, 15}]] %t A194859 row[n_] := Position[f, n]; %t A194859 u = TableForm[Table[row[n], {n, 1, 20}]] %t A194859 g[n_, k_] := Part[row[n], k]; %t A194859 p = Flatten[Table[g[k, n - k + 1], {n, 1, 13}, %t A194859 {k, 1, n}]] (* A194860 *) %t A194859 q[n_] := Position[p, n]; Flatten[Table[q[n], %t A194859 {n, 1, 80}]] (* A194861 *) %Y A194859 Cf. A194832, A194860, A194861. %K A194859 nonn,tabl %O A194859 1,2 %A A194859 _Clark Kimberling_, Sep 04 2011