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A123719
An involution of nonnegative integers: signature permutation of Catalan automorphism which is obtained with recursion schema RIBS from automorphism *A085161
2
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 21, 19, 20, 18, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 35, 33, 34, 32, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 58, 56, 54, 49, 63, 51, 52, 53, 48, 62, 47, 57, 46, 59, 60, 61, 55, 50, 64, 65, 66, 67, 68, 69, 70, 71
OFFSET
0,3
COMMENTS
Recursion schema RIBS is defined in A122200. Number of fixed points in range [A014137(n-1)..A014138(n-1)] of this permutation is given by INVERT transform of A001405, appropriately shifted.
PROG
(Scheme function, constructive implementation of this automorphism acting on S-expressions:) (define *A123719 (RIBS *A085161))
CROSSREFS
a(n) = A085160(A085163(n)). A085163(n) = A085159(a(n)).
Sequence in context: A275156 A188459 A146295 * A113221 A113219 A179978
KEYWORD
nonn
AUTHOR
Antti Karttunen, Oct 11 2006
STATUS
approved