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Search: id:A079224
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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). +0
4
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; listen)
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 this_sequence A002369 A005957 A158448

Adjacent sequences: A079221 A079222 A079223 this_sequence A079225 A079226 A079227

KEYWORD

nonn

AUTHOR

Antti Karttunen (my_firstname.my_surname(AT)iki.fi) Jan 03 2002

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Last modified December 7 08:40 EST 2009. Contains 170430 sequences.


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