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A061144 Sum of the areas of triangles whose vertices lie on the n X n grid with unit spacing as enumerated in A045996. 1

%I #10 Jan 22 2023 16:59:38

%S 0,2,70,764,4718,20658,71616,209752,540416,1259050,2704494,5433420,

%T 10320054,18688026,32478032,54460064,88495536,139857842,215617062,

%U 325102172,480442174,697204602,995133456,1399002496,1939589056

%N Sum of the areas of triangles whose vertices lie on the n X n grid with unit spacing as enumerated in A045996.

%H Nathaniel Johnston, <a href="/A061144/a061144.c.txt">C program for computing terms</a>

%e a(2)=4*(1/2)=2 and a(3)=32*(1/2)+32*(1)+4*(3/2)+8*(2)=70.

%Y Cf. A045996.

%K nonn

%O 1,2

%A _Zachary Franco_, Apr 15 2001

%E a(14)-a(25) and corrected offset from _Nathaniel Johnston_, Apr 29 2011

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Last modified June 20 11:12 EDT 2024. Contains 373527 sequences. (Running on oeis4.)