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 A269655 #4 Mar 02 2016 11:30:00 %S A269655 8,64,512,4089,32600,259476,2061940,16359580,129599404,1025145474, %T A269655 8097221352,63866100432,503041727344,3956869283864,31083352671872, %U A269655 243863266575744,1910824354782112,14954229427038576,116893085869240608 %N A269655 Number of length-n 0..7 arrays with no adjacent pair x,x+1 repeated. %C A269655 Column 7 of A269656. %H A269655 R. H. Hardin, <a href="/A269655/b269655.txt">Table of n, a(n) for n = 1..210</a> %H A269655 R. H. Hardin, <a href="/A269655/a269655.txt">Empirical recurrence of order 64</a> %F A269655 Empirical recurrence of order 64 (see link above) %e A269655 Some solutions for n=5 %e A269655 ..1. .4. .4. .0. .2. .2. .2. .7. .0. .3. .6. .4. .5. .3. .1. .0 %e A269655 ..1. .3. .4. .3. .2. .2. .7. .0. .3. .1. .5. .5. .5. .1. .6. .7 %e A269655 ..4. .5. .3. .0. .0. .5. .1. .3. .4. .1. .3. .0. .2. .0. .5. .4 %e A269655 ..4. .2. .4. .1. .2. .2. .3. .7. .3. .6. .4. .6. .4. .1. .1. .5 %e A269655 ..0. .6. .4. .7. .3. .6. .1. .3. .1. .2. .0. .7. .1. .5. .3. .0 %Y A269655 Cf. A269656. %K A269655 nonn %O A269655 1,1 %A A269655 _R. H. Hardin_, Mar 02 2016