id:A080980 - OEIS Search Results

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A014486-indices of the trees whose interior zigzag-tree (Stanley's c) is branch-reduced (in the sense defined by Donaghey).

+0
5

0, 1, 2, 3, 5, 6, 7, 11, 12, 15, 16, 18, 20, 29, 30, 32, 34, 39, 40, 43, 47, 48, 49, 53, 55, 57, 81, 82, 85, 89, 90, 91, 95, 97, 99, 113, 114, 116, 118, 123, 124, 136, 137, 139, 140, 141, 143, 146, 155, 159, 160, 161, 165, 167, 173, 183, 245, 246, 248, 250, 255, 256, 268 (list; graph; listen)

	OFFSET	`0,3`
	REFERENCES	`R. Donaghey, Automorphisms on Catalan trees and bracketing, J. Combin. Theory, Series B, 29 (1980), 75-90.`
	LINKS	`R. P. Stanley, Exercises on Catalan and Related Numbers`
	CROSSREFS	`Cf. A080979. a(n) = A080300(A080981(n)). See comment at A080981. Complement of A080970.` `Sequence in context: A164922 A145739 A121700 this_sequence A134669 A053328 A089633` `Adjacent sequences: A080977 A080978 A080979 this_sequence A080981 A080982 A080983`
	KEYWORD	`nonn`
	AUTHOR	`Antti Karttunen (my_firstname.my_surname(AT)iki.fi) Mar 02 2003`

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Last modified December 17 13:29 EST 2009. Contains 170826 sequences.

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