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 A337659 #16 Oct 05 2020 01:28:41 %S A337659 2,3,4,6,7,10,8,9,12,14,16,17,20,22,30,23,24,27,29,37,44,32,33,36,38, %T A337659 46,53,62,51,52,55,57,65,72,81,100,69,70,73,75,83,90,99,118,136,91,92, %U A337659 95,97,105,112,121,140,158,180,102,103,106,108,116,123,132,151,169,191,202 %N A337659 Triangular array read by rows: T(n,k) = A337655(n) + A337655(k), for 1 <= k <= n. %C A337659 This is the lower triangular part of the addition table from A337655, read by rows. %C A337659 Sequences A337659, A337660, A337661, A337662 arise from the addition and multiplication tables in A337655, each one described in two ways. Perhaps someone could help by creating the analogous sets of four sequences for the addition and multiplication tables in the closely related sequences A337656 and A337946. %H A337659 Peter Kagey, <a href="/A337659/b337659.txt">Table of n, a(n) for n = 1..10011</a> (first 141 rows, flattened) %e A337659 The addition table from A337655 begins: %e A337659 2, 3, 6, 8, 16, 23, 32, 51, 69, 91, ... %e A337659 3, 4, 7, 9, 17, 24, 33, 52, 70, 92, ... %e A337659 6, 7, 10, 12, 20, 27, 36, 55, 73, 95, ... %e A337659 8, 9, 12, 14, 22, 29, 38, 57, 75, 97, ... %e A337659 16, 17, 20, 22, 30, 37, 46, 65, 83, 105, ... %e A337659 23, 24, 27, 29, 37, 44, 53, 72, 90, 112, ... %e A337659 32, 33, 36, 38, 46, 53, 62, 81, 99, 121, ... %e A337659 51, 52, 55, 57, 65, 72, 81, 100, 118, 140, ... %e A337659 69, 70, 73, 75, 83, 90, 99, 118, 136, 158, ... %e A337659 91, 92, 95, 97, 105, 112, 121, 140, 158, 180, ... %e A337659 ... %Y A337659 Cf. A337655, A337660, A337661, A337662. %K A337659 nonn,tabl %O A337659 1,1 %A A337659 _N. J. A. Sloane_, Oct 03 2020