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Search: id:A059755
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| A059755 |
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Odd n such that n-r and n+r are perfect squares, where r is the reverse of n. |
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+0
2
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| 65, 868591084757, 6979302951885, 6157577986646405, 8052956026592517, 8052956206592517, 8650327689541457, 8650349867341457, 619431353040136925, 619631153042134925, 631688638047992345, 633288858025996145, 633488632647994145, 653488856225994125
(list; graph; listen)
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OFFSET
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1,1
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REFERENCES
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Shyam Sunder Gupta, "Systematic Computations of Rare Numbers", The Mathematics Education, Vol. XXXII, No. 3, 1998.
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LINKS
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C. Rivera, Prime Puzzles Page
Shyam Sunder Gupta, Rare Numbers
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EXAMPLE
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65-56 = 9 and 65 + 56 = 121 are both perfect squares.
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CROSSREFS
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Cf. A035519.
Sequence in context: A015072 A015039 A035519 this_sequence A138843 A033386 A008896
Adjacent sequences: A059752 A059753 A059754 this_sequence A059756 A059757 A059758
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KEYWORD
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nice,nonn,base
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AUTHOR
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Shyam Sunder Gupta (guptass(AT)rediffmail.com), Feb 11 2001
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