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If A009927 is regarded as the coordination sequence of AuNb_3, this sequence gives cumulative number of Nb atoms in shells 1 through n.

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`%I #6 Dec 15 2015 15:29:43
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`%S 12,48,132,300,576,960,1488,2184,3120,4224
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`%N If A009927 is regarded as the coordination sequence of AuNb_3, this sequence gives cumulative number of Nb atoms in shells 1 through n.
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`%C a(n)+A265039(n) = A265038(n).
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`%H V. A. Blatov, A. P. Shevchenko, D. M. Proserpio, <a href="http://pubs.acs.org/doi/pdf/10.1021/cg500498k">Applied Topological Analysis of Crystal Structures with the Program Package ToposPro</a>, Cryst. Growth Des. 2014, 14, 3576-3586. See Table I.
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`%Y Cf. A009927, A265038, A265039.
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`%K nonn,more
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`%O 1,1
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`%A _N. J. A. Sloane_, Dec 15 2015
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