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 A048710 #13 Jan 02 2017 04:04:24 %S A048710 1,5,7,17,27,21,85,119,65,107,257,427,325,455,273,1285,1799,1105,1755, %T A048710 1365,1911,4369,6939,5397,7607,4097,6827,5189,21845,30583,16705,27499, %U A048710 20485,28679,17745,28123,65537 %N A048710 Family 1 "Rule 90 x Rule 150 Array" read by antidiagonals. %C A048710 Infinitely many one-dimensional cellular automaton rules (given in sequence A048705) occur in this array, as combinations of CA-rules "90" (generates rows) and "150" (generates columns). %C A048710 No pattern occurs twice in such arrays. %C A048710 Each row/column can be generated from its predecessor row/column with SHIFTXORADJ transformation, given in A048711. %H A048710 <a href="/index/Ce#cell">Index entries for sequences related to cellular automata</a> %H A048710 <a href="http://www.iki.fi/%7Ekartturi/matikka/r90x150a.htm">More information</a> %F A048710 a(n) = rule150(rule90(1, (((trinv(n)-1)*(((1/2)*trinv(n))+1))-n)), (n-((trinv(n)*(trinv(n)-1))/2))). %e A048710 1 5 17 85 257 1105 ... [ beginning of array ] %e A048710 7 27 119 427 1799 ... %e A048710 21 65 325 1105 5397 ... %p A048710 trinv := n -> floor((1+sqrt(1+8*n))/2); # Gives integral inverses of the triangular numbers %Y A048710 Rows = A038183, A048711, A048713, columns = A038184, A048712, A048713, diagonal = A048709. Cf. A048720. %K A048710 nonn,tabl %O A048710 0,2 %A A048710 _Antti Karttunen_, Mar 18 1999