A135792 Positive numbers of the form x^5-10x^3*y^2+5x*y^4 (where x,y are integers and y>x).

41, 122, 316, 1121, 1312, 1900, 2868, 2876, 3904, 4282, 6121, 9963, 10112, 11516, 17684, 19841, 20122, 23028, 23807, 25525, 29646, 31996, 35872, 41984, 44403, 49001, 59162, 60800, 65900, 71996, 76453, 76788, 80404, 91776, 92032

Offset

1,1

Comments

Refers to A057102, which had an incorrect description and has been replaced by A256418. As a result the present sequence should be re-checked. - N. J. A. Sloane, Apr 06 2015

Links

Table of n, a(n) for n=1..35.

Mathematica

a = {}; Do[Do[w = x^5 - 10x^3 y^2 + 5x y^4; If[w > 0 && w < 100000, AppendTo[a, w]], {y, x, 1000}], {x, 1, 1000}]; Union[a]

Crossrefs

Cf. A000404, A050803, A057102, A135784, A060803, A135786, A135787, A135789, A135790, A135791, A135793.

Sequence in context: A044292 A044673 A135793 * A256347 A232100 A195038

Adjacent sequences: A135789 A135790 A135791 * A135793 A135794 A135795

Keyword

nonn

Author

Artur Jasinski, Nov 29 2007

Status

approved