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Search: id:A045542
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| A045542 |
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Sub-perfect powers: perfect powers (squares, cubes etc.) minus 1. |
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+0
1
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| 3, 7, 8, 15, 24, 26, 31, 35, 48, 63, 80, 99, 120, 124, 127, 143, 168, 195, 215, 224, 242, 255, 288, 323, 342, 360, 399, 440, 483, 511, 528, 575, 624, 675, 728, 783, 840, 899, 960, 999, 1023, 1088, 1155, 1224, 1295, 1330, 1368, 1443, 1520, 1599, 1680, 1727
(list; graph; listen)
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OFFSET
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0,1
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COMMENT
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Goldbach showed that Sum 1/a(n) = 1.
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REFERENCES
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R. L. Graham, D. E. Knuth and O. Patashnik, Concrete Mathematics. Addison-Wesley, Reading, MA, 2nd edition, p. 66.
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CROSSREFS
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Equals A001597 - 1.
Sequence in context: A051211 A105173 A076683 this_sequence A031404 A105263 A136136
Adjacent sequences: A045539 A045540 A045541 this_sequence A045543 A045544 A045545
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KEYWORD
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easy,nice,nonn
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AUTHOR
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William M. Glasgow (billg(AT)wakely.com)
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EXTENSIONS
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More terms from Larry Reeves (larryr(AT)acm.org), Jun 11 2002
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