

A201948


Automorphic numbers: n^2 ends with n in base 18 (written in base 10).


6



0, 1, 9, 10, 81, 244, 729, 5104, 6561, 98416, 413344, 1476225, 9034497, 24977728, 263063296, 349156737, 2711943424, 8308017153, 96467701761, 101891588608, 1286623443969, 2283843782656, 30847581595648, 33420828483585, 352189631991808, 804641749434369
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OFFSET

1,3


LINKS

Eric M. Schmidt, Table of n, a(n) for n = 1..1000


EXAMPLE

a(3) = 9 = (9)_18 since 9^2 = 81 = (49)_18 ends with 9 in base 18.
a(4) = 10 = (A)_18 since 10^2 = 100 = (5A)_18 ends with A in base 18.
a(5) = 81 = (49)_18 since 81^2 = 6561 = (1249)_18 ends with 49 in base 18.


PROG

(Sage) See A003226.  Eric M. Schmidt, Feb 09 2014


CROSSREFS

Cf. A003226, A201821, A201918, A201919, A201921, A237583.
Sequence in context: A025635 A116555 A038300 * A249311 A041039 A041176
Adjacent sequences: A201945 A201946 A201947 * A201949 A201950 A201951


KEYWORD

nonn,base


AUTHOR

Martin Renner, Dec 06 2011


EXTENSIONS

More terms from Eric M. Schmidt, Feb 09 2014


STATUS

approved



