A233181 Highly composite numbers of the form x^2 + xy + y^2.

1, 4, 12, 36, 48, 25200

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