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Search: id:A001660
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| A001660 |
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Hypothenusal numbers.
(Formerly M1706 N0675)
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+0
2
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| 1, 1, 2, 6, 36, 876, 408696, 83762796636, 3508125906207095591916, 6153473687096578758445014683368786661634996, 18932619208894981833333582059033329370801260096062214926751788496235698477988081702676
(list; graph; listen)
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OFFSET
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0,3
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REFERENCES
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J. J. Sylvester and M. J. Hammond, On Hamilton's numbers, Phil. Trans. Roy. Soc., 178 (1887), 285-312.
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LINKS
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E. Lucas, Th\'{e}orie des Nombres. Gauthier-Villars, Paris, 1891, Vol. 1, p. 496.
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CROSSREFS
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First differences of A000905.
Sequence in context: A089709 A055512 A078973 this_sequence A014052 A014056 A113375
Adjacent sequences: A001657 A001658 A001659 this_sequence A001661 A001662 A001663
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KEYWORD
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nonn,easy,nice
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AUTHOR
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njas
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