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A152411
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Nonnegative integers representable as m^2 - n^4 for positive integers m,n.
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1
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0, 3, 8, 9, 15, 19, 20, 24, 33, 35, 40, 48, 51, 63, 65, 68, 73, 80, 84, 88, 99, 104, 105, 115, 120, 128, 129, 143, 144, 148, 153, 159, 163, 168, 175, 180, 185, 195, 200, 201, 208, 209, 216, 224, 225, 228, 240, 243, 255, 260, 273, 275, 280, 288, 289, 303, 304, 308, 319, 320
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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COMMENTS
| Nonnegative integers representable as the product u*v with (u-v)/2 being a square.
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PROG
| (PARI) for(k=1, 1000, fordiv(k, d, if(d*d>=k, break); if( issquare((k\d - d)/2), print1(k, ", "); break) ) )
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CROSSREFS
| Cf. A087286, A165289, A152412.
Sequence in context: A071677 A084747 A101065 * A080517 A191487 A176205
Adjacent sequences: A152408 A152409 A152410 * A152412 A152413 A152414
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane, Oct 24 2009, based on email from Joerg Arndt (arndt(AT)jjj.de), Oct 10 2009
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EXTENSIONS
| Edited and extended by Max Alekseyev (maxale(AT)gmail.com), Feb 06 2010
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