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

 

Logo

Please make a donation to keep the OEIS running. We are now in our 55th year. In the past year we added 12000 new sequences and reached 8000 citations (which often say "discovered thanks to the OEIS"). We need to raise money to hire someone to manage submissions, which would reduce the load on our editors and speed up editing.
Other ways to donate

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A153831 Index sequence to A089840: set-wise difference of A153829 and A153830. 6
68, 73, 74, 83, 84, 87, 88, 183, 184, 189, 190, 199, 202, 203, 252, 254, 261, 262, 268, 269, 270, 271, 515, 537, 539, 573, 575, 591, 593, 871, 894, 895, 990, 995, 996, 1110, 1132, 1134, 1466, 1489, 1490, 1585, 1590, 1591, 1600, 1601, 1604, 1605, 2213 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

The terms give the positions to bijections in A089840 which preserve A153835/A127302 (the non-oriented form of binary trees), but do not extend uniquely to automorphisms of an infinite binary tree.

LINKS

A. Karttunen, Table of n, a(n) for n = 0..2933

A. Karttunen, C-program for computing the initial terms of this sequence

CROSSREFS

Cf. also A153826, A153827, A153828, A153832, A153833.

Sequence in context: A058906 A130694 A269748 * A306113 A058980 A079703

Adjacent sequences:  A153828 A153829 A153830 * A153832 A153833 A153834

KEYWORD

nonn

AUTHOR

Antti Karttunen, Jan 07 2009

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 December 13 17:17 EST 2019. Contains 329970 sequences. (Running on oeis4.)