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Template:Sequence of the Day for November 28

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Intended for: November 28, 2014

Timetable

  • First draft to be entered by August 28, 2014
  • Draft to be reviewed by September 28, 2014
  • Draft to be approved by October 28, 2014
Yesterday's SOTD * Tomorrow's SOTD

The line below marks the end of the <noinclude> ... </noinclude> section.


A1202345: Sequence name.

0.11282012112812...

A sentence or two about this sequence.


Thanksgiving Day 2019 falls on November 28.



A000055: Number of trees with
n, n   ≥   0,
unlabeled nodes.
{ 1, 1, 1, 1, 2, 3, 6, 11, 23, 47, 106, 235, ... }

Trees with
n
unlabeled nodes[1]

n
Trees
0
 
Null tree
1
2
●—●
3
●—●—●
4
             ●
            /
●—●—●—●  ●—●  
            \
             ●
5
                 ●    ●
                /     |
●—●—●—●—●  ●—●—●    ●—●—●  
                \     |
                 ●    ●

This is the sequence for the example search on the front page of the OEIS. This Thanksgiving we are thankful for, among other things, the OEIS, which is an invaluable resource in many mathematical and scientific endeavors.

__________

  1. Weisstein, Eric W., Tree, from MathWorld—A Wolfram Web Resource.