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 A154792 #6 Dec 08 2015 08:57:16 %S A154792 0,1,3,1,0,5,0,3,5,0,0,3,0,7,0,0,0,5,7,0,0,0,3,0,0,0,11,0,0,0,5,0,0, %T A154792 11,0,0,0,0,0,7,0,11,0,0,0,0,0,0,7,0,0,13,0,0,0 %N A154792 Triangle read by rows in which row n lists the pair of noncomposite numbers that are equidistant from and nearest to n, with 0's inserted, as shown below in the example. %e A154792 Triangle begins: %e A154792 n ........ Pair %e A154792 1 ..........0 %e A154792 2 ........ 1,3 %e A154792 3 ....... 1,0,5 %e A154792 4 ...... 0,3,5,0 %e A154792 5 ..... 0,3,0,7,0 %e A154792 6 .... 0,0,5,7,0,0 %Y A154792 Cf. A008578, A154720, A154721, A154722, A154723, A154791. %K A154792 more,nonn,tabl %O A154792 1,3 %A A154792 _Omar E. Pol_, Jan 25 2009