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A137508
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Successive structures of alkaline earth metals (periodic table elements from 2nd column).
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3
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2, 2, 2, 8, 2, 2, 8, 8, 2, 2, 8, 18, 8, 2, 2, 8, 18, 18, 8, 2, 2, 8, 18, 32, 18, 8, 2
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OFFSET
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1,1
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COMMENTS
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LINKS
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EXAMPLE
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27 terms: 2, 2 for beryllium, ... Every structure is palindromic (even and odd mixed). Also 2*A106314.
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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