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 A243610 #8 Jan 05 2025 19:51:40 %S A243610 1,0,2,-1,4,-3,-2,8,-7,-6,-4,3,16,-15,-14,-12,-8,5,6,7,32,-31,-30,-28, %T A243610 -24,-16,-5,9,10,12,13,14,15,64,-63,-62,-60,-56,-48,-32,-13,-11,-10, %U A243610 -9,17,18,20,24,25,26,28,29,30,31,128,-127,-126,-124,-120,-112 %N A243610 Irregular triangular array of all the integers, each exactly once, ordered as in Comments. %C A243610 Let F = A000045 (the Fibonacci numbers). To construct the array, decree the first 4 rows as in the Example. Thereafter, row n consists of F(n) numbers in increasing order, generated as follows: the F(n-1) numbers 2*x from x in row n-1, together with the F(n-2) numbers 1 - 2*x from numbers x in row n-2. For n >= 3, row n consists of F(n-1) negative integers and F(n-2) positive integers; also, row n consists of F(n-1) even integers and F(n-2) odd integers. Conjecture: Every row contains F(k) or -F(k) for some k. %H A243610 Clark Kimberling, <a href="/A243610/b243610.txt">Table of n, a(n) for n = 1..4000</a> %H A243610 Danielle Cox and Karyn McLellan, <a href="https://web.archive.org/web/2024*/https://www.fq.math.ca/Papers1/55-2/CoxMcLellan021717.pdf">A Problem on Generation Sets Containing Fibonacci Numbers</a>, Fibonacci Quart. 55 (2017), no. 2, 105-113. %e A243610 First 7 rows of the array: %e A243610 1 %e A243610 0 .... 2 %e A243610 -1 ... 4 %e A243610 -3 ... -2 ... 8 %e A243610 -7 ... -6 ... -4 ... 3 .... 16 %e A243610 -15 .. -14 .. -12 .. -8 ... 5 .... 6 ... 7 .. 32 %e A243610 -31 .. -30 .. -28 .. -24 .. -16 .. -5 .. 9 .. 10 . 12 . 13 . 14 . 15 . 64 %t A243610 z = 12; g[1] = {1}; f1[x_] := 2 x; f2[x_] := 1 - x; h[1] = g[1]; %t A243610 b[n_] := b[n] = DeleteDuplicates[Union[f1[g[n - 1]], f2[g[n - 1]]]]; %t A243610 h[n_] := h[n] = Union[h[n - 1], g[n - 1]]; %t A243610 g[n_] := g[n] = Complement [b[n], Intersection[b[n], h[n]]] %t A243610 u = Table[g[n], {n, 1, 12}] %t A243610 v = Flatten[u] %Y A243610 Cf. A243571, A000045. %K A243610 easy,tabf,sign %O A243610 1,3 %A A243610 _Clark Kimberling_, Jun 08 2014