id:A079220 - 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 four-fold application of gatomorphisms A057511/A057512 (Deep rotation of general parenthesizations/plane trees).

+0
3

1, 1, 1, 2, 2, 1, 5, 5, 0, 1, 11, 14, 0, 4, 1, 30, 36, 1, 14, 0, 1, 82, 102, 0, 48, 0, 0, 1, 233, 293, 0, 153, 0, 0, 0, 1, 680, 860, 2, 488, 0, 2, 0, 0, 1, 2033, 2575, 0, 1550, 1, 0, 0, 4, 0, 1, 6164, 7838, 0, 4920, 0, 0, 0, 0, 0, 0, 1, 18923, 24148, 5, 15672, 0, 5, 0, 14, 0, 0, 0, 1 (list; table; graph; listen)

	OFFSET	`0,4`
	COMMENT	`Note: the counts given here are inclusive, i.e. T(n,d) includes also the count A079218(n,d).`
	MAPLE	`[seq(A079220(n), n=0..119)]; A079220 := n -> PFixedByA057511(A003056(n)+1, 4, A002262(n)+1);`
	CROSSREFS	`The row sums equal to the left edge shifted left once = A079225 = fourth row of A079216 (the latter gives the Maple procedure PFixedByA057511). Cf. also A079217-A079222 and A003056 & A002262.` `Sequence in context: A136388 A099605 A079218 this_sequence A158068 A123971 A114292` `Adjacent sequences: A079217 A079218 A079219 this_sequence A079221 A079222 A079223`
	KEYWORD	`nonn,tabl`
	AUTHOR	`Antti Karttunen (my_firstname.my_surname(AT)iki.fi) Jan 03 2002`

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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.

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