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 A038178 n = (sum of digits of n)^(number of digits of n). 2
 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 81, 512, 2401 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 COMMENTS Subset of A023106. - R. J. Mathar, Oct 20 2008 LINKS FORMULA a(n) = (1/10)*(n-(n mod 10))*(729*n^2-14879*n+75971)+(n mod 10). - Rolf Pleisch, Feb 06 2008 EXAMPLE n=512 is in the sequence because (5 + 1 + 2)^3 = 512. MATHEMATICA Select[Range[2500], #==Total[IntegerDigits[#]]^IntegerLength[#]&] (* Harvey P. Dale, Oct 26 2011 *) CROSSREFS Sequence in context: A237346 A193757 A246605 * A023106 A135480 A289979 Adjacent sequences:  A038175 A038176 A038177 * A038179 A038180 A038181 KEYWORD nonn,nice,fini,full,base AUTHOR EXTENSIONS To prove completeness, consider that k^m contains more than m digits for every k >= 10 and check 1<=k<=9 explicitly. - Ulrich Schimke (ulrschimke(AT)aol.com) STATUS approved

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Last modified December 11 07:46 EST 2019. Contains 329914 sequences. (Running on oeis4.)