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 A337660 #10 Jul 09 2025 04:53:53 %S A337660 2,3,3,6,4,6,8,7,7,8,16,9,10,9,16,23,17,12,12,17,23,32,24,20,14,20,24, %T A337660 32,51,33,27,22,22,27,33,51,69,52,36,29,30,29,36,52,69,91,70,55,38,37, %U A337660 37,38,55,70,91,102,92,73,57,46,44,46,57,73,92,102,125,103,95,75,65,53,53,65,75,95,103,125 %N A337660 Addition table from A337655, read by antidiagonals. %H A337660 Peter Kagey, <a href="/A337660/b337660.txt">Table of n, a(n) for n = 1..10011</a> (first 141 antidiagonals, flattened) %e A337660 The addition table from A337655 begins: %e A337660 2, 3, 6, 8, 16, 23, 32, 51, 69, 91, ... %e A337660 3, 4, 7, 9, 17, 24, 33, 52, 70, 92, ... %e A337660 6, 7, 10, 12, 20, 27, 36, 55, 73, 95, ... %e A337660 8, 9, 12, 14, 22, 29, 38, 57, 75, 97, ... %e A337660 16, 17, 20, 22, 30, 37, 46, 65, 83, 105, ... %e A337660 23, 24, 27, 29, 37, 44, 53, 72, 90, 112, ... %e A337660 32, 33, 36, 38, 46, 53, 62, 81, 99, 121, ... %e A337660 51, 52, 55, 57, 65, 72, 81, 100, 118, 140, ... %e A337660 69, 70, 73, 75, 83, 90, 99, 118, 136, 158, ... %e A337660 91, 92, 95, 97, 105, 112, 121, 140, 158, 180, ... %e A337660 ... %Y A337660 Cf. A337655, A337659, A337661, A337662. %K A337660 nonn,tabl %O A337660 1,1 %A A337660 _N. J. A. Sloane_, Oct 04 2020