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A162219
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Base 4 perfect digital invariants (written in base 10): numbers equal to the sum of the k-th powers of their base-4 digits, for some k.
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11
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0, 1, 2, 3, 8, 9, 28, 29, 32, 33, 35, 43, 55, 62, 83, 128, 129, 243, 512, 513, 922, 2048, 2049, 2316, 2317, 2444, 2445, 2571, 2699, 7330, 8192, 8193, 13124, 13125, 20710, 21222, 32768, 32769, 40392, 40393, 131072, 131073, 524288, 524289, 1075174
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,3
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LINKS
| Joseph Myers, Table of n, a(n) for n=1..6778 (complete to 1500 base 4 digits)
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CROSSREFS
| Cf. A162220 (corresponding exponents), A010344 (restriction to power = number of digits), A033836, A162221. In other bases: A162216 (base 3), A162222 (base 5), A162225 (base 6), A162228 (base 7), A162231 (base 8), A162234 (base 9), A023052 (base 10).
Sequence in context: A085453 A030439 A119386 * A140484 A087034 A133165
Adjacent sequences: A162216 A162217 A162218 * A162220 A162221 A162222
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KEYWORD
| base,nonn
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AUTHOR
| Joseph Myers (jsm(AT)polyomino.org.uk), Jun 28 2009
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