A027730 - 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 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

A027730

Number of independent subsets of nodes in graph formed from n-fold subdivision of tetrahedron.

1, 2, 5, 43, 910, 88151, 40685288, 128501941884, 3361302069076948

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,2

LINKS

Table of n, a(n) for n=0..8.

CROSSREFS

Sequence in context: A116297 A215170 A286871 * A225724 A333734 A163115

Adjacent sequences: A027727 A027728 A027729 * A027731 A027732 A027733

KEYWORD

nonn

AUTHOR

R. H. Hardin

STATUS

approved