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 A292963 #4 Oct 05 2017 21:29:32 %S A292963 1,2,4,3,7,9,5,11,15,14,6,16,22,24,20,8,19,29,34,32,27,10,25,38,45,48, %T A292963 43,35,12,30,46,57,62,61,54,42,13,36,55,70,79,81,76,67,50,17,40,64,83, %U A292963 95,101,100,92,78,58,18,47,73,97,113,122,125,120,108,89 %N A292963 Rectangular array by antidiagonals: T(n,m) = rank of n*(e + m) when all the numbers k*(e+h), for k>=1, h>=0, are jointly ranked. %C A292963 Every positive integer occurs exactly once, so that as a sequence, this is a permutation of the positive integers. %H A292963 Clark Kimberling, <a href="/A292963/b292963.txt">Antidiagonals n=1..60, flattened</a> %F A292963 T(n,m) = Sum_{k=1...[n + m*n/e]} [1 - e + n*(e + m)/k], where [ ]=floor. %e A292963 Northwest corner: %e A292963 1 2 3 5 6 8 %e A292963 4 7 11 16 19 25 %e A292963 9 15 22 29 38 46 %e A292963 14 24 34 45 57 70 %e A292963 20 32 48 62 79 95 %e A292963 27 43 61 81 101 122 %e A292963 35 54 76 100 125 152 %e A292963 42 67 92 120 151 181 %e A292963 The numbers k*(r+h), approximately: %e A292963 (for k=1): 2.718 3.718 4.718 ... %e A292963 (for k=2): 5.436 7.436 9.436 ... %e A292963 (for k=3): 8.154 11.854 14.154 ... %e A292963 Replacing each by its rank gives %e A292963 1 2 3 %e A292963 4 7 14 %e A292963 9 15 22 %t A292963 r = E; z = 12; %t A292963 t[n_, m_] := Sum[Floor[1 - r + n*(r + m)/k], {k, 1, Floor[n + m*n/r]}]; %t A292963 u = Table[t[n, m], {n, 1, z}, {m, 0, z}]; TableForm[u] (* A292963 array *) %t A292963 Table[t[n - k + 1, k - 1], {n, 1, z}, {k, n, 1, -1}] // Flatten (* A292963 sequence *) %Y A292963 Cf. A182801, A292964. %K A292963 nonn,easy,tabl %O A292963 1,2 %A A292963 _Clark Kimberling_, Oct 05 2017