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 A143310 #18 Mar 11 2021 02:52:17
%S A143310 1,3,2,6,2,3,10,6,3,4,15,6,3,4,5,21,12,9,4,5,6,28,12,9,4,5,6,7,36,20,
%T A143310 9,12,5,6,7,8,45,20,18,12,5,6,7,8,9,55,30,18,12,15,6,7,8,9,10,66,30,
%U A143310 18,12,15,6,7,8,9,10,11,78,42,30,24,15,18,7,8,9,10,11,12
%N A143310 Triangle read by rows, A000012 * A127446, 1 <= k <= n.
%C A143310 Row sums = A143127: (1, 5, 11, 23, 33, 57, 71, ...).
%F A143310 Triangle read by rows, A000012 * A127446, 1 <= k <= n.
%F A143310 Conjecture: T(n,k) = Sum_{i=1..n} [i*k <= n]*i*k. - _Mats Granvik_, Feb 26 2021
%e A143310 First few rows of the triangle:
%e A143310 1;
%e A143310 3, 2;
%e A143310 6, 2, 3;
%e A143310 10, 6, 3, 4;
%e A143310 15, 6, 3, 4, 5;
%e A143310 21, 12, 9, 4, 5, 6;
%e A143310 28, 12, 9, 4, 5, 6, 7;
%e A143310 36, 20, 9, 12, 5, 6, 7, 8;
%e A143310 ...
%Y A143310 Cf. A127446, A143127.
%K A143310 nonn,tabl
%O A143310 1,2
%A A143310 _Gary W. Adamson_, Aug 06 2008
%E A143310 Duplicate a(11)-a(15) terms removed by _Mats Granvik_, Feb 26 2021