The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A171872 Triangle read by columns: Distinct classifications of N elements containing exactly R binary partitions. 6
1, 0, 1, 0, 1, 1, 0, 2, 3, 3, 1, 1, 0, 3, 17, 36, 60, 56, 50, 27, 19, 6, 4, 1, 1, 0, 6, 74, 573, 2802, 10087, 26512, 55088, 91984, 130267, 157662, 168890, 158658, 133576, 98804, 65664, 38073, 19963, 9013, 3779 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,8
COMMENTS
The bottom of each column is marked by a single 0 in this sequence. Value is 0 for all (N,R) for which N is greater than 2^R.
See note on efficient computation in A171871.
LINKS
CROSSREFS
First term in each column is A000055(R+1).
Column 4 shares terms with A034189, column 5 with A034190.
Sequence in context: A228624 A124798 A318741 * A005135 A290003 A139460
KEYWORD
nonn,tabf
AUTHOR
Robert Munafo, Jan 21 2010
STATUS
approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified June 13 22:21 EDT 2024. Contains 373391 sequences. (Running on oeis4.)