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 A256659 #5 Apr 09 2015 07:59:14 %S A256659 4,7,6,12,11,10,20,19,18,16,25,32,31,29,26,33,40,52,50,47,42,38,53,65, %T A256659 84,81,76,68,41,61,86,105,136,131,123,110,46,66,99,139,170,220,212, %U A256659 199,178,54,74,107,160,225,275,356,343,322,288,59,87,120,173,259 %N A256659 Rectangular array by antidiagonals: row n consists of numbers k such that -F(n+1) is the trace of the minimal alternating Fibonacci representation of k, where F = A000045 (Fibonacci numbers). %C A256659 See A256655 for definitions. This array and the array at A256658 partition the positive integers. The row differences are Fibonacci numbers. The columns satisfy the Fibonacci recurrence x(n) = x(n-1) + x(n-2). %e A256659 Northwest corner: %e A256659 4 7 12 20 25 33 38 41 46 %e A256659 6 11 19 32 40 53 61 66 74 %e A256659 10 18 31 52 65 86 99 102 120 %e A256659 16 29 50 84 105 139 160 173 194 %e A256659 26 47 81 136 170 225 259 280 314 %t A256659 b[n_] = Fibonacci[n]; bb = Table[b[n], {n, 1, 70}]; %t A256659 h[0] = {1}; h[n_] := Join[h[n - 1], Table[b[n + 2], {k, 1, b[n]}]]; %t A256659 g = h[18]; r[0] = {0}; %t A256659 r[n_] := If[MemberQ[bb, n], {n}, Join[{g[[n]]}, -r[g[[n]] - n]]]; %t A256659 t = Table[Last[r[n]], {n, 0, 1000}]; (* A256656 *) %t A256659 TableForm[Table[Flatten[-1 + Position[t, b[n]]], {n, 2, 8}]] (* A256658 *) %t A256659 TableForm[Table[Flatten[-1 + Position[t, -b[n]]], {n, 2, 8}]] (* A256659 *) %Y A256659 Cf. A000045, A256655, A246658. %K A256659 nonn,tabl,easy %O A256659 1,1 %A A256659 _Clark Kimberling_, Apr 08 2015