Search: id:A007532
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%I A007532 M0487
%S A007532 1,2,3,4,5,6,7,8,9,24,43,63,89,132,135,153,175,209,224,226,262,
%T A007532 264,267,283,332,333,334,357,370,371,372,373,374,375,376,377,
%U A007532 378,379,407,445,463,518,598,629,739,794,849,935,994,1034
%N A007532 Powerful numbers (2): a sum of positive powers of its digits.
%D A007532 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%H A007532 David W. Wilson, <a href="b007532.txt">Table of n, a(n) for n = 1..10000</
               a>
%H A007532 <a href="Sindx_Pow.html#powerful">Index entries for sequences related 
               to powerful numbers</a>
%H A007532 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               PowerfulNumber.html">Link to a section of The World of Mathematics.</
               a>
%F A007532 If n = d_1 d_2 ... d_k in decimal then there are integers m_1 m_2 ... 
               m_k > 0 such that n = d_1^m_1 + ... + d_k^m_k.
%e A007532 43 = 4^2 + 3^3 is OK; 254 = 2^7 + 5^3 + 4^0 is not OK since one of the 
               powers is 0.
%Y A007532 Cf. A001694, A005934, A005188, A003321, A014576, A023052, A046074.
%Y A007532 Different from A061862.
%Y A007532 Sequence in context: A126957 A134703 A061862 this_sequence A068189 A069716 
               A095289
%Y A007532 Adjacent sequences: A007529 A007530 A007531 this_sequence A007533 A007534 
               A007535
%K A007532 base,nonn,nice
%O A007532 1,2
%A A007532 N. J. A. Sloane (njas(AT)research.att.com), Robert G. Wilson v (rgwv(AT)rgwv.com)

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