|
| |
|
|
A134738
|
|
Cubes which are not the sum of three squares.
|
|
2
|
|
|
|
343, 3375, 12167, 21952, 29791, 59319, 103823, 166375, 216000, 250047, 357911, 493039, 658503, 778688, 857375, 1092727, 1367631, 1404928, 1685159, 1906624, 2048383, 2460375, 2924207, 3442951, 3796416, 4019679, 4657463, 5359375
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
1,1
|
|
|
COMMENTS
|
This sequence was inspired by e-mail from Ray Chandler, Nov 07 2007
|
|
|
LINKS
|
Table of n, a(n) for n=1..28.
|
|
|
FORMULA
|
a(n) = A004215(n)^3. [From Ray Chandler, Jan 29 2009]
|
|
|
MATHEMATICA
|
b = Table[x^3, {x, 1, 300}]; a = {}; Do[Do[Do[AppendTo[a, (x^2 + y^2 + z^2)^3], {x, 0, 30}], {y, 0, 30}], {z, 0, 30}]; Union[a]; Complement[b, a] (*Artur Jasinski*)
|
|
|
CROSSREFS
|
Cf. A134739.
Sequence in context: A167730 A016923 A016983 * A017151 A017247 A017355
Adjacent sequences: A134735 A134736 A134737 * A134739 A134740 A134741
|
|
|
KEYWORD
|
nonn
|
|
|
AUTHOR
|
Artur Jasinski, Nov 07 2007
|
|
|
EXTENSIONS
|
Extended by Ray Chandler, Jan 29 2009
|
|
|
STATUS
|
approved
|
| |
|
|
