A079224 - OEIS

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A079224

Number of Catalan objects fixed by three-fold application of the gatomorphisms A057511/A057512 (Deep rotation of general parenthesizations/plane trees).

1, 1, 2, 3, 8, 18, 43, 104, 273, 702, 1870, 4985, 13562, 37038, 102266, 283774, 793189, 2227115, 6286044, 17811751, 50672898, 144639235, 414181050, 1189365940, 3424477813, 9883578364, 28589660227, 82870288432, 240672107114 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,3`
	FORMULA	`a(n) = A079216(n, 3)`
	MAPLE	`A079224 := n -> A079216bi(n, 3);`
	CROSSREFS	`The third row of A079216. The leftmost edge of the triangle A079219 and also its row sums shifted by one. Occurs in A073202 as row 43639. Cf. A057546, A079223-A079227.` `Sequence in context: A129955 A034066 A034076 * A002369 A005957 A158448` `Adjacent sequences: A079221 A079222 A079223 * A079225 A079226 A079227`
	KEYWORD	`nonn`
	AUTHOR	`Antti Karttunen (my_firstname.my_surname(AT)iki.fi) Jan 03 2002`

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Last modified February 16 14:07 EST 2012. Contains 205930 sequences.