login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A125982 Signature-permutation of the inverse of Deutsch's 2000 bijection on ordered trees. 4
0, 1, 3, 2, 8, 6, 7, 4, 5, 22, 19, 20, 14, 15, 21, 16, 17, 9, 10, 18, 11, 13, 12, 64, 60, 61, 51, 52, 62, 53, 54, 37, 38, 55, 39, 41, 40, 63, 56, 57, 42, 43, 58, 44, 45, 23, 24, 46, 25, 27, 26, 59, 47, 48, 28, 29, 50, 33, 36, 34, 49, 30, 35, 31, 32, 196, 191, 192, 177, 178 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

REFERENCES

Emeric Deutsch, A Bijection on Ordered Trees and Its Consequences, J. Combin. Theory, A 90 (2000), no. 1, 210-215.

LINKS

A. Karttunen, Table of n, a(n) for n = 0..2055

Index entries for signature-permutations of Catalan automorphisms

PROG

(MIT Scheme implementation of this automorphism that acts on S-expressions, i.e. list-structures:) (define (*A125982 s) (cond ((null? s) s) (else (map *A125982 (cons (except-last-pair s) (car (last-pair s)))))))

CROSSREFS

Inverse: A125981. A125984 gives the A057163-conjugate.

Sequence in context: A130960 A130927 A057162 * A125983 A130364 A130995

Adjacent sequences:  A125979 A125980 A125981 * A125983 A125984 A125985

KEYWORD

nonn

AUTHOR

Antti Karttunen, Jan 02 2007

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified November 19 03:27 EST 2019. Contains 329310 sequences. (Running on oeis4.)