A171872 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 59th year, we have over 358,000 sequences, and we’ve crossed 10,300 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

A171872

Triangle read by columns: Distinct classifications of N elements containing exactly R binary partitions.

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	`Table of n, a(n) for n=0..44.` `R. Munafo, Classifications of N Elements`
	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` `Adjacent sequences: A171869 A171870 A171871 * A171873 A171874 A171875`
	KEYWORD	`nonn,tabf`
	AUTHOR	`Robert Munafo, Jan 21 2010`
	STATUS	`approved`

License Agreements, Terms of Use, Privacy Policy. .

Last modified December 2 05:20 EST 2022. Contains 358485 sequences. (Running on oeis4.)