| 0, 7, 91, 92, 93, 94, 95, 114, 115, 116, 117, 118, 4207, 4209, 4211, 4214, 4216, 4299, 4301, 4303, 4305, 4307, 1228, 1229, 1230, 1231, 1232, 1233, 1234, 1235, 1236, 1237, 1238, 1239, 1240, 1241, 1242, 1243, 1244, 1245, 1246, 1247, 1248, 1249, 1250, 1347
(list; graph; listen)
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OFFSET
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0,2
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COMMENT
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If the count of fixed points of the automorphism A089840[n] is given by sequence f, then the count of fixed points of the automorphism A089840[A123694(n)] is given by CONV(f,A000108) (where CONV stands for convolution). See also the comments at A122200.
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LINKS
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A. Karttunen, C-program for computing the initial terms of this sequence
A. Karttunen, Prolog-program which illustrates the nonrecursive Catalan automorphisms given on example-lines.
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EXAMPLE
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When A089840[1] = A069770 (swap binary tree sides) is applied to the left subtree of a binary tree, we get A089840[7] = A089854, thus a(1)=7. When A089840[12] = A074679 is applied to the left subtree of a binary tree, we get A089840[4207] = A089865, thus a(12)=4207.
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CROSSREFS
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Sequence in context: A099719 A103064 A007820 this_sequence A085026 A004368 A130978
Adjacent sequences: A123691 A123692 A123693 this_sequence A123695 A123696 A123697
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KEYWORD
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nonn
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AUTHOR
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Antti Karttunen (His_Firstname.His_Surname(AT)gmail.com), Oct 11 2006
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