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!)
A135782 Positive numbers of the form 3x y^2-x^3 (where x,y are positive integers). 1
2, 9, 10, 11, 16, 26, 36, 38, 44, 46, 47, 54, 72, 74, 80, 88, 107, 115, 117, 128, 135, 142, 146, 182, 187, 191, 198, 208, 234, 236, 242, 243, 250, 270, 286, 288, 297, 299, 304, 341, 352, 362, 368, 376, 413, 414, 415, 431, 432, 470, 478, 504, 506, 524, 530, 549 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..56.

MATHEMATICA

a = {}; Do[Do[w = 3x y^2 - x^3; If[(w > 0) && w < 3000, AppendTo[a, w]], {x, 1, 1000}], {y, 1, 1000}]; Union[a]

CROSSREFS

Cf. A135781.

Sequence in context: A043065 A077214 A167451 * A281899 A037457 A037314

Adjacent sequences:  A135779 A135780 A135781 * A135783 A135784 A135785

KEYWORD

nonn

AUTHOR

Artur Jasinski, Nov 29 2007

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 June 20 14:20 EDT 2021. Contains 345165 sequences. (Running on oeis4.)