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%I #5 Nov 11 2021 16:57:26
%S 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
%N Successive structures of alkaline earth metals (periodic table elements from 2nd column).
%C Apparently a(n) = A168281(n+1). - _Georg Fischer_, Nov 11 2021
%e 27 terms: 2, 2 for beryllium, ... Every structure is palindromic (even and odd mixed). Also 2*A106314.
%Y Cf. A005993, A099956, A168281. Same numbers as in A093907.
%K nonn
%O 1,1
%A _Paul Curtz_, Apr 23 2008
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