id:A079217 - OEIS Search Results

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Triangle T(n,d) (listed row-wise: T(1,1)=1, T(2,1)=1, T(2,2)=1, T(3,1)=2, T(3,2)=0, T(3,3)=1, ...) giving the number of n-edge general plane trees with root degree d that are fixed by the gatomorphisms A057511/A057512 (Deep rotation of general parenthesizations/plane trees).

+0
8

1, 1, 1, 2, 0, 1, 3, 1, 0, 1, 5, 0, 0, 0, 1, 6, 2, 1, 0, 0, 1, 10, 0, 0, 0, 0, 0, 1, 11, 5, 0, 1, 0, 0, 0, 1, 18, 0, 2, 0, 0, 0, 0, 0, 1, 21, 11, 0, 0, 1, 0, 0, 0, 0, 1, 34, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 35, 26, 3, 2, 0, 1, 0, 0, 0, 0, 0, 1, 68, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 69, 66, 0, 0, 0, 0, 1, 0, 0 (list; table; graph; listen)

	OFFSET	`0,4`
	LINKS	`Index entries for sequences related to parenthesizing`
	MAPLE	`[seq(A079217(n), n=0..119)]; A079217 := n -> PFixedByA057511(A003056(n)+1, 1, A002262(n)+1);`
	CROSSREFS	`The row sums equal to the left edge shifted left once = A057546 = first row of A079216 (the latter gives the Maple procedure PFixedByA057511). Cf. also A079218, A079219, A079220, A079221, A079222 and A003056 and A002262.` `Adjacent sequences: A079214 A079215 A079216 this_sequence A079218 A079219 A079220` `Sequence in context: A100260 A124943 A099557 this_sequence A079221 A026794 A137712`
	KEYWORD	`nonn,tabl`
	AUTHOR	`Antti Karttunen (my_firstname.my_surname(AT)iki.fi) Jan 03 2002`

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Last modified October 15 09:18 EDT 2008. Contains 145015 sequences.

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