A079226 - OEIS

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A079226

Number of Catalan objects fixed by five-fold application of the Catalan bijections A057511/A057512 (deep rotation of general parenthesizations/plane trees).

1, 1, 2, 3, 5, 6, 15, 36, 108, 301, 814, 2080, 5223, 12919, 32557, 83943, 222591, 600252, 1632814, 4440240, 12043224, 32572225, 88081208, 238722759, 649725756, 1776546687, 4877740703, 13432630929, 37063472432, 102389547753

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OFFSET

0,3

LINKS

Table of n, a(n) for n=0..29.

FORMULA

a(n) = A079216(n, 5)

MAPLE

A079226 := n -> A079216bi(n, 5);

CROSSREFS

The fifth row of A079216. The leftmost edge of the triangle A079221 and also its row sums shifted by one. Occurs in A073202 as row 9259542121261050623. Cf. A057546, A079223-A079227.

Sequence in context: A249752 A222313 A355483 * A055686 A126250 A293027

Adjacent sequences: A079223 A079224 A079225 * A079227 A079228 A079229

KEYWORD

nonn

AUTHOR

Antti Karttunen Jan 03 2002

STATUS

approved