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 A061144 #10 Jan 22 2023 16:59:38 %S A061144 0,2,70,764,4718,20658,71616,209752,540416,1259050,2704494,5433420, %T A061144 10320054,18688026,32478032,54460064,88495536,139857842,215617062, %U A061144 325102172,480442174,697204602,995133456,1399002496,1939589056 %N A061144 Sum of the areas of triangles whose vertices lie on the n X n grid with unit spacing as enumerated in A045996. %H A061144 Nathaniel Johnston, <a href="/A061144/a061144.c.txt">C program for computing terms</a> %e A061144 a(2)=4*(1/2)=2 and a(3)=32*(1/2)+32*(1)+4*(3/2)+8*(2)=70. %Y A061144 Cf. A045996. %K A061144 nonn %O A061144 1,2 %A A061144 _Zachary Franco_, Apr 15 2001 %E A061144 a(14)-a(25) and corrected offset from _Nathaniel Johnston_, Apr 29 2011