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A129611
Signature-permutation of a Catalan automorphism, row 169 of A089840.
4
0, 1, 3, 2, 7, 8, 6, 4, 5, 17, 18, 20, 22, 21, 16, 19, 14, 9, 10, 15, 11, 12, 13, 45, 46, 48, 49, 50, 54, 55, 61, 63, 64, 57, 62, 58, 59, 44, 47, 53, 60, 56, 42, 51, 37, 23, 24, 38, 25, 26, 27, 43, 52, 39, 28, 29, 40, 30, 31, 32, 41, 33, 34, 35, 36, 129, 130, 132, 133, 134
OFFSET
0,3
COMMENTS
Automorphism *A089859 = ENIPS(*A129611). See the definition given in A122204.
PROG
(Constructive and destructive Scheme implementation of this automorphism. These act on S-expressions, i.e. list-structures:)
(define (*A129611 s) (cond ((pair? s) (*A089859 (cons (car s) (*A089863 (cdr s))))) (else s)))
(define (*A129611! s) (cond ((pair? s) (*A089863! (cdr s)) (*A089859! s))) s)
CROSSREFS
Inverse: A129612.
Sequence in context: A122327 A154452 A130999 * A154456 A122328 A082346
KEYWORD
nonn
AUTHOR
Antti Karttunen, May 22 2007
STATUS
approved