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A055851
a(n) and floor[a(n)/6] are both squares; i.e. squares which remain squares when written in base 6 and last digit is removed.
+0
2
0, 1, 4, 9, 25, 100, 729, 2401, 9604, 71289, 235225, 940900, 6985449, 23049601, 92198404, 684502569
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Maintained by
N. J. A. Sloane
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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.
AT&T Labs Research
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