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 A144337 #16 Aug 10 2023 13:13:57 %S A144337 1,2,1,3,2,3,4,3,6,5,5,4,9,10,7,6,5,12,15,14,9,7,6,15,20,21,18,11,8,7, %T A144337 18,25,28,27,22,13,9,8,21,30,35,36,33,26,15,10,9,24,35,42,45,44,39,30, %U A144337 17,11,10,27,40,49,54,55,52,45,34,19 %N A144337 Triangle read by rows, A000012 * (2*A144328 - A000012). %C A144337 When the first column is removed from this triangle (A144337), the result is triangle A101447. - _Georg Fischer_, Aug 10 2023 %e A144337 First few rows of the triangle: %e A144337 1; %e A144337 2, 1; %e A144337 3, 2, 3; %e A144337 4, 3, 6, 5; %e A144337 5, 4, 9, 10, 7; %e A144337 6, 5, 12, 15, 14, 9; %e A144337 7, 6, 15, 20, 21, 18, 11; %e A144337 8, 7, 18, 25, 28, 27, 22, 13; %e A144337 9, 8, 21, 30, 35, 36, 33, 26, 15; %e A144337 10, 9, 24, 35, 42, 45, 44, 39, 30, 17; %e A144337 ... %Y A144337 Cf. A081489, A101447, A144328. %K A144337 nonn,tabl %O A144337 1,2 %A A144337 _Gary W. Adamson_ and _Roger L. Bagula_, Sep 18 2008 %E A144337 a(25) corrected by _Georg Fischer_, Aug 10 2023