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 A158027 #4 Jun 09 2016 21:44:19 %S A158027 1,2,3,6,15,25,35,56,227,398,847,986,1713,4589,6460,7465,24860,28741 %N A158027 Sides of squares which are filled exactly (no holes, no overlaps) by the digits needed to write a subsequence of consecutive Fibonacci numbers, starting with 0. %C A158027 The Fibonacci numbers fitting exactly in a "Fibonacci-digits square" are given by A158026. Terms computed by Jean-Marc Falcoz. %H A158027 Eric Angelini, <a href="http://www.cetteadressecomportecinquantesignes.com/DigitSpiral.htm">Digit Spiral</a> %H A158027 E. Angelini, <a href="/A158022/a158022.pdf">Digit Spiral</a> [Cached copy, with permission] %e A158027 ...0...01...011...011235 %e A158027 .......12...235...813213 %e A158027 ............813...455891 %e A158027 ..................442333 %e A158027 ..................776109 %e A158027 ..................871597 %e A158027 The above squares, filled exactly by a subsequence of consecutive Fibonacci numbers starting with 0 have sides 1, 2, 3, 6. There are no side-4 and side-5 squares with this property. The next properly filled square will have side 15. %K A158027 base,nonn %O A158027 1,2 %A A158027 _Eric Angelini_, Mar 11 2009