login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A158519 The larger member a of a pair of integers a>=b such that sqrt((a+b+2)^4+4ab) and sqrt((a+b+3)^4+8ab) are simultaneously integers. 0
14, 51, 54, 99, 132, 143, 160, 224, 260, 299, 344, 407, 440, 450, 527, 531, 539, 615, 666, 714, 1025, 1064, 1104, 1196, 1287, 1295, 1420, 1512, 2013, 2024, 2024, 2070, 2133, 2184, 2484, 2716, 2750, 3024, 3311, 3375, 3401, 3564, 4047, 4224, 4514, 4524 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Entries are repeated if there is more than one matching b.

LINKS

Table of n, a(n) for n=1..46.

Lorenz Halbeisen, Fans and bundles in the graph of pairwise sums and products, El. J. Comb. 11 (2004) #R6.

CROSSREFS

Sequence in context: A082668 A231044 A231076 * A043132 A039309 A043912

Adjacent sequences:  A158516 A158517 A158518 * A158520 A158521 A158522

KEYWORD

nonn

AUTHOR

R. J. Mathar, Mar 20 2009

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
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 12 21:06 EDT 2021. Contains 343829 sequences. (Running on oeis4.)