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

 

Logo

Annual Appeal: Today, Nov 11 2014, is the 4th anniversary of the launch of the new OEIS web site. 70,000 sequences have been added in these four years, all edited by volunteers. Please make a donation (tax deductible in the US) to help keep the OEIS running.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A158439 Numbers arising in Kane's conjecture on representing sets with sums of triangular numbers. 0
1, 5, 7, 9, 11, 13, 17, 19, 25, 29, 35, 49, 89 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Similar to Conway-Schneeberger 15 theorem. Kane, p.2: Conjecture 1.3. A sum of triangular numbers f represents all odd integers if and only if it represents the integers 1, 5, 7, 9, 11, 13, 17, 19, 25, 29, 35, 49, 89.

LINKS

Table of n, a(n) for n=1..13.

Ben Kane, Representing Sets with Sums of Triangular Numbers, arXiv:0903.3026 [math.NT], Mar 17 2009.

CROSSREFS

Cf. A000217, A030050.

Sequence in context: A081001 A075025 A075394 * A124112 A049758 A064077

Adjacent sequences:  A158436 A158437 A158438 * A158440 A158441 A158442

KEYWORD

nonn,fini,full

AUTHOR

Jonathan Vos Post, Mar 19 2009

STATUS

approved

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

Content is available under The OEIS End-User License Agreement .

Last modified December 19 08:21 EST 2014. Contains 252186 sequences.