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!)
A233181 Highly composite numbers of the form x^2 + xy + y^2. 0
1, 4, 12, 36, 48, 25200 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Intersection of A002182 and A003136.

There are no more terms in this sequence; further terms would require a highly composite number with no primes of the form 6n+5 appearing with an odd exponent. - Charles R Greathouse IV, Dec 05 2013

LINKS

Table of n, a(n) for n=1..6.

CROSSREFS

Sequence in context: A090328 A200541 A149318 * A053595 A300553 A062858

Adjacent sequences:  A233178 A233179 A233180 * A233182 A233183 A233184

KEYWORD

nonn,fini,full,less

AUTHOR

Irina Gerasimova, Dec 05 2013

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 September 18 07:13 EDT 2021. Contains 347510 sequences. (Running on oeis4.)