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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A201186 Incorrect list of perfect numbers from Robert Recorde's Whetstone of Witte.

Original entry on oeis.org

6, 28, 496, 8128, 130816, 2096128, 33550336, 536854528
Offset: 1

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Author

Olivier Gérard, Nov 28 2011

Keywords

Comments

In this list, only items 6, 28, 496, 8128 and 33550336 are perfect numbers.

References

  • Jack Williams, Robert Recorde Tudor Polymath, Expositor and Practitioner of Computation, Springer, 2011, page 176.

Links

  • Robert Recorde, The Whetstone of Witte, whiche is the seconde parte of Arithmeteke: containing the extraction of rootes; the cossike practise, with the rule of equation; and the workes of Surde Nombers, London, 1557. See p. 24.

Crossrefs

Cf. A000396 (perfect numbers), A079598.

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