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A293750
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a(n) is the total number of 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, 2, 4, 6, 10, 12, 18, 20, 26, 30, 36, 38, 46, 48, 54, 62, 72, 74, 84, 86, 96, 104, 110, 112, 124, 130, 136, 144, 158, 160
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,2
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LINKS
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FORMULA
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EXAMPLE
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Illustration of initial terms (n = 1..6):
. _ _ _ _
. _ _ _ _ _ _ |_
. _ _ _ _ _ _| _ _ _| |_
. _ _ _ _ |_ _ _ |_ _ _ _ |_ _ |
. _ _ _ _|_ _ _|_ | _ _|_ | | _ _|_ | | |
. _ _ | _ | | _ | | | _ | | | | _ | | | | |
. | | | | | | | | | | | | | | | | | | | | |
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. 2 4 6 10 12 18
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CROSSREFS
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Cf. A000203, A024916, A196020, A235791, A236104, A237048, A237270, A237271, A237590, A237591, A237593, A245092, A262626, A294723, A294847.
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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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