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 A167972 #14 May 27 2024 11:33:15 %S A167972 1,2,3,4,5,6,7,1,8,2,9,3,10,4,11,5,12,6,13,7,14,1,8,15,2,9,16,3,10,17, %T A167972 4,11,18,5,12,19,6,13,20,7,14,21,1,8,15,22,2,9,16,23,3,10,17,24,4,11, %U A167972 18,25,5,12,19,26,6,13,20,27,7,14,21,28,1,8,15,22,29,2,9,16,23,30,3,10,17 %N A167972 Signature sequence of Phi^4 = 6.8541019662497..., where Phi is the golden ratio 1.6180339887499... . %D A167972 Clark Kimberling, "Fractal Sequences and Interspersions," Ars Combinatoria 45 (1997) 157-168. %H A167972 <a href="/index/Si#signature_sequences">Index entries for sequences related to signature sequences</a> %t A167972 terms = 83; m = Ceiling[Sqrt[terms]]; s0 = {}; While[s = (Table[i + j*GoldenRatio^4, {i, 1, m}, {j, 1, m}] // Flatten // SortBy[#, N] &)[[1 ;; terms]] /. GoldenRatio -> 0; s != s0, s0 = s; m = 2 m]; s (* _Jean-François Alcover_, Jan 08 2017 *) %Y A167972 Cf. A084531, A084532, A167968. %K A167972 nonn %O A167972 1,2 %A A167972 _Casey Mongoven_, Nov 15 2009