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A201821 Automorphic numbers: n^2 ends with n in base 6 (written in base 6). 9
0, 1, 3, 4, 13, 44, 213, 344, 5344, 50213, 205344, 350213, 1350213, 4205344, 21350213, 34205344, 221350213, 334205344, 2221350213, 3334205344, 52221350213, 152221350213, 403334205344, 5152221350213, 55152221350213, 155152221350213, 400403334205344 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
REFERENCES
Albert H. Beiler, Recreations in the theory of numbers, New York, Dover, (2nd ed.) 1966, p. 147.
Maurice Kraitchik, Mathematical Recreations, New York, Dover, (2nd ed.) 1953, p. 77.
LINKS
EXAMPLE
a(3) = (3)_6 = 3 since 3^2 = 9 = (13)_6 ends with 3 in base 6.
a(4) = (4)_6 = 4 since 4^2 = 16 = (24)_6 ends with 4 in base 6.
a(5) = (13)_6 = 9 since 9^2 = 81 = (213)_6 ends with 13 in base 6.
CROSSREFS
Cf. A237583 (written in base 10), A003226, A201918, A201919, A201921, A201948.
Sequence in context: A194649 A062165 A243764 * A001056 A122151 A294384
KEYWORD
nonn,base
AUTHOR
Martin Renner, Dec 06 2011
EXTENSIONS
More terms from Eric M. Schmidt, Feb 09 2014
STATUS
approved

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Last modified March 28 04:13 EDT 2024. Contains 371235 sequences. (Running on oeis4.)