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A147857 Differences of two positive 4th powers. 9
0, 15, 65, 80, 175, 240, 255, 369, 544, 609, 624, 671, 1040, 1105, 1215, 1280, 1295, 1695, 1776, 2145, 2320, 2385, 2400, 2465, 2800, 3439, 3471, 3840, 4015, 4080, 4095, 4160, 4641, 5265, 5904, 5936, 6095, 6305, 6480, 6545, 6560, 7599, 7825, 8080, 8704 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

If n belongs to this sequence then so does n*m^4 for any positive integer m. Primitive elements (i.e., not of the form n*m^4 for m>1) are listed in A147858.

There is no square in this sequence except 0. - Altug Alkan, Apr 08 2016

LINKS

Table of n, a(n) for n=0..44.

MATHEMATICA

nn = 50; Take[Union @@ Map[Differences, Union@ Map[Sort@ # &, Tuples[Range[Ceiling[nn/3]], {2}]]^4], nn] (* Michael De Vlieger, Apr 09 2016 *)

CROSSREFS

Cf. A147854, A147856, A147858

Sequence in context: A118531 A144710 A096905 * A147858 A005917 A218216

Adjacent sequences:  A147854 A147855 A147856 * A147858 A147859 A147860

KEYWORD

nonn

AUTHOR

Max Alekseyev, Nov 15 2008, Nov 19 2008

STATUS

approved

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Last modified March 26 21:00 EDT 2017. Contains 284137 sequences.