A079227 Number of Catalan objects fixed by six-fold application of the Catalan bijections A057511/A057512 (Deep rotation of general parenthesizations/plane trees).

1, 1, 2, 5, 14, 38, 111, 332, 1029, 3232, 10374, 33679, 110722, 367252, 1228558, 4138120, 14025473, 47792389, 163643066, 562722427, 1942548520, 6729230281, 23385132060, 81503084084, 284815902739, 997741303308, 3503112067273

Offset

0,3

Links

Table of n, a(n) for n=0..26.

Formula

a(n) = A079216(n, 6)

Maple

A079227 := n -> A079216bi(n, 6);

Crossrefs

The sixth row of A079216. The leftmost edge of the triangle A079222 and also its row sums shifted by one. Occurs in A073202 as row 170143779648513184865579715159814351615. Cf. A057546, A079223-A079226.

Sequence in context: A026288 A006574 A053419 * A371606 A148314 A001011

Adjacent sequences: A079224 A079225 A079226 * A079228 A079229 A079230

Keyword

nonn

Author

Antti Karttunen Jan 03 2002

Status

approved