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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 Adjacent sequences:  A201818 A201819 A201820 * A201822 A201823 A201824 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 May 28 12:27 EDT 2020. Contains 334681 sequences. (Running on oeis4.)