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A294849
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a(n) is the total number of horizontal line segments that belong to the Dyck paths in the diagram of the symmetries of sigma described in A236104 and A237593 after n-th stage, with a(0) = 0.
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2
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0, 1, 2, 3, 5, 6, 9, 10, 13, 15, 18, 19, 23, 24, 27, 31, 36, 37, 42, 43, 48, 52, 55, 56, 62, 65, 68, 72, 79, 80
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OFFSET
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0,3
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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 A293750.
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LINKS
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FORMULA
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CROSSREFS
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Cf. A000203, A196020, A235791, A236104, A237048, A237591, A237593, A245092, A293750, A294847, A294848.
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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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