

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).


KEYWORD

nonn,tabf


AUTHOR



STATUS

approved



