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 A144034 #7 Jun 02 2025 00:33:41 %S A144034 1,4,1,4,4,5,4,4,20,13,4,4,20,52,41,4,4,20,52,164,121,4,4,20,52,164, %T A144034 484,365,4,4,20,52,164,484,1460,1093,4,4,20,52,164484,1460,4372,3281, %U A144034 4,4,20,52,164,484,1460,4372,13124,9841 %N A144034 Eigentriangle read by rows, T(n,k) = A123932(n-k+1)*A046717(k). %C A144034 Row sums = A046717 shifted: (1, 5, 13, 41, 121,...). Right border = A046717. %C A144034 Sum of n-th row terms = rightmost term of (n+1)-th row. %F A144034 Eigentriangle read by rows, T(n,k) = A123932(n-k+1)*A046717(k) %e A144034 First few rows of the triangle = %e A144034 1; %e A144034 4, 1; %e A144034 4, 4, 5; %e A144034 4, 4, 20, 13; %e A144034 4, 4, 20, 52, 41; %e A144034 4, 4, 20, 52, 164, 121; %e A144034 4, 4, 20, 52, 164, 484, 365; %e A144034 ... %e A144034 Row 4 = (4, 4, 20, 13) = termwise products (4, 4, 4, 1) and (1, 1, 5, 13). %Y A144034 Cf. A123932, A046717. %K A144034 nonn,tabl %O A144034 1,2 %A A144034 _Gary W. Adamson_, Sep 07 2008