References to A167268

Janet's sequence. Number of elements for each successively filled electronic subshells of an atom.
2, 2, 6, 2, 6, 2, 10, 6, 2, 10, 6, 2, 14, 10, 6, 2, 14, 10, 6, 2, 18, 14, 10, 6, 2, 18, 14, 10

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