id:A079221 - 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 five-fold application of gatomorphisms A057511/A057512 (Deep rotation of general parenthesizations/plane trees).

+0
4

1, 1, 1, 2, 0, 1, 3, 1, 0, 1, 5, 0, 0, 0, 1, 6, 2, 1, 0, 5, 1, 15, 0, 0, 0, 20, 0, 1, 36, 5, 0, 1, 65, 0, 0, 1, 108, 0, 2, 0, 190, 0, 0, 0, 1, 301, 11, 0, 0, 501, 0, 0, 0, 0, 1, 814, 0, 0, 0, 1265, 0, 0, 0, 0, 0, 1, 2080, 26, 3, 2, 3105, 1, 0, 0, 0, 5, 0, 1, 5223, 0, 0, 0, 7695, 0, 0, 0, 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(A079221(n), n=0..119)]; A079221 := n -> PFixedByA057511(A003056(n)+1, 5, A002262(n)+1);`
	CROSSREFS	`The row sums equal to the left edge shifted left once = A079226 = fifth row of A079216 (the latter gives the Maple procedure PFixedByA057511). Cf. also A079217-A079222 and A003056 and A002262.` `Sequence in context: A124943 A099557 A079217 this_sequence A026794 A137712 A093555` `Adjacent sequences: A079218 A079219 A079220 this_sequence A079222 A079223 A079224`
	KEYWORD	`nonn,tabl`
	AUTHOR	`Antti Karttunen (my_firstname.my_surname(AT)iki.fi) Jan 03 2002`

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Last modified December 10 12:37 EST 2009. Contains 170569 sequences.

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