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A147857 Differences of two positive 4th powers. 10
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 August 15 07:26 EDT 2018. Contains 313756 sequences. (Running on oeis4.)