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Numbers of the form x^x, where x equals the number of digits in the number.

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`%I #2 Jul 11 2010 03:00:00
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`%S 1,16777216,387420489
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`%N Numbers of the form x^x, where x equals the number of digits in the number.
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`%C a(1): 1 digit, 1^1 = 1. a(2): 8 digits, 8^8 = 16777216. a(3), 9 digits, 9^9 = 387420489
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`%K nonn,base,bref,fini,full
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`%O 1,2
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`%A Florian Roeseler (hazz_dollazz(AT)web.de), May 02 2010
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