login
This site is supported by donations to The OEIS Foundation.

 

Logo

Annual appeal: Please make a donation to keep the OEIS running! Over 6000 articles have referenced us, often saying "we discovered this result with the help of the OEIS".
Other ways to donate

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A212815 a(n) = largest number k >= 7 such that A212813(k) = n. 6
8, 12, 54, 258280326 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

Bellamy and Cadogan say that a(4) = 2*3^86093441, which is too large to include here.

REFERENCES

Bellamy, O. S.; Cadogan, C. C. Subsets of positive integers: their cardinality and maximality properties. Proceedings of the Tenth Southeastern Conference on Combinatorics, Graph Theory and Computing (Florida Atlantic Univ., Boca Raton, Fla., 1979), pp. 167--178, Congress. Numer., XXIII-XXIV, Utilitas Math., Winnipeg, Man., 1979. MR0561043 (82b:10006)

LINKS

Table of n, a(n) for n=0..3.

CROSSREFS

Cf. A036288, A212813, A212814, A212816, A212908, A212909.

Sequence in context: A009926 A022668 A286360 * A069186 A166625 A038290

Adjacent sequences:  A212812 A212813 A212814 * A212816 A212817 A212818

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, May 30 2012

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy .

Last modified November 21 16:08 EST 2017. Contains 295003 sequences.