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%I
%S 0,8,32,72,128,200,288,392,512,648,800,968,1152,1352,1568,1800,2048,
%T 2312,2592,2888,3200,3528,3872,4232,4608,5000,5408,5832,6272,6728,
%U 7200,7688,8192,8712,9248,9800,10368,10952,11552,12168,12800
%N 8n^2.
%C Opposite numbers to the centered 16-gonal numbers (A069129) in the square spiral whose vertices are the triangular numbers (A000217).
%C 8 times the squares. [From Omar E. Pol, Dec 09 2008]
%C a(n-1) is the molecular topological index of the n-wheel graph W_n - Eric Weisstein, Jul 11 2011
%C An n * n pandiagonal magic square has a(n) orientations - Kausthub Gudipati, Sep 15, 2011
%H Vincenzo Librandi, <a href="/A139098/b139098.txt">Table of n, a(n) for n = 0..800</a>
%H O. E. Pol, <a href="http://www.polprimos.com">Determinacion geometrica de los numeros primos y perfectos</a>.
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/MolecularTopologicalIndex.html">Molecular Topological Index</a>
%F a(n) = A000290(n)*8. [From Omar E. Pol, Dec 09 2008]
%F a(n) = A001105(n)*4 = A016742(n)*2. [From Omar E. Pol, Dec 13 2008]
%t s=0;lst={s};Do[s+=n++ +8;AppendTo[lst, s], {n, 0, 8!, 16}];lst [From Vladimir Orlovsky, Nov 16 2008]
%o (MAGMA) [8*n^2: n in [0..50]]; // Vincenzo Librandi, Apr 26 2011
%Y Cf. A000217, A000290, A016766, A033582, A069129, A001105, A016742.
%K easy,nonn
%O 0,2
%A _Omar E. Pol_, Apr 25 2008
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