id:A079218 - 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)=2, T(3,3)=1, ...) giving the number of n-edge general plane trees with root degree d that are fixed by the two-fold application of gatomorphisms A057511/A057512 (Deep rotation of general parenthesizations/plane trees).

+0
5

1, 1, 1, 2, 2, 1, 5, 5, 0, 1, 11, 14, 0, 0, 1, 26, 36, 1, 2, 0, 1, 66, 94, 0, 0, 0, 0, 1, 161, 253, 0, 5, 0, 0, 0, 1, 420, 668, 2, 0, 0, 2, 0, 0, 1, 1093, 1807, 0, 14, 1, 0, 0, 0, 0, 1, 2916, 4902, 0, 0, 0, 0, 0, 0, 0, 0, 1, 7819, 13436, 5, 36, 0, 5, 0, 2, 0, 0, 0, 1, 21304, 37016, 0, 0, 0, 0 (list; table; graph; listen)

	OFFSET	`0,4`
	COMMENT	`Note: the counts given here are inclusive, i.e. T(n,d) includes also the count A079217(n,d).`
	MAPLE	`[seq(A079218(n), n=0..119)]; A079218 := n -> PFixedByA057511(A003056(n)+1, 2, A002262(n)+1);`
	CROSSREFS	`The row sums equal to the left edge shifted left once = A079223 = second row of A079216 (the latter gives the Maple procedure PFixedByA057511). Cf. also A079217-A079222 and A003056 & A002262.` `Sequence in context: A101975 A136388 A099605 this_sequence A079220 A158068 A123971` `Adjacent sequences: A079215 A079216 A079217 this_sequence A079219 A079220 A079221`
	KEYWORD	`nonn,tabl`
	AUTHOR	`Antti Karttunen (my_firstname.my_surname(AT)iki.fi) Jan 03 2002`

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Last modified December 20 16:54 EST 2009. Contains 171081 sequences.

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