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A294848
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a(n) is the total number of horizontal line segments in the diagram of the symmetries of sigma described in A236104 after n-th stage, with a(0) = 1.
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2
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1, 2, 3, 4, 6, 7, 10, 11, 14, 16, 19, 20, 24, 25, 28, 32, 37, 38, 43, 44, 49, 53, 56, 57, 63, 66, 69, 73, 80, 81
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OFFSET
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0,2
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COMMENTS
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Since the diagram is symmetrics a(n) is also the number of vertical line segments after n-th stage. For a diagram see A294847.
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LINKS
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FORMULA
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CROSSREFS
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KEYWORD
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nonn,more
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AUTHOR
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STATUS
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approved
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