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A162219 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. 11
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; text; internal format)
OFFSET

1,3

LINKS

Joseph Myers, Table of n, a(n) for n=1..6778 (complete to 1500 base 4 digits)

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: A271394 A030439 A119386 * A140484 A087034 A133165

Adjacent sequences:  A162216 A162217 A162218 * A162220 A162221 A162222

KEYWORD

base,nonn

AUTHOR

Joseph Myers, Jun 28 2009

STATUS

approved

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Last modified April 20 06:36 EDT 2019. Contains 322294 sequences. (Running on oeis4.)