Search: id:A114570
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%I A114570
%S A114570 1,2,3,4,5,6,7,8,9,1,2,3,4,5,6,7,8,9,10,4,5,6,7,8,9,10,11,12,13,9,10,11,
%T A114570 12,13,14,15,16,17,18,16,17,18,19,20,21,22,23,24,25,25,26,27,28,29,30,
%U A114570 31,32,33,34,36,37,38,39,40,41,42,43,44,45,49,50,51,52,53,54,55,56,57
%N A114570 Let the decimal expansion of n be d_1 d_2 ... d_k; then a(n) = Sum_{i=1..k} 
               d_i^(k+1-i}.
%C A114570 Every number n (of two or more digits) is guaranteed to yield a smaller 
               number a(n) since 9^k < 10^k This sequence is related to other sequences 
               about sum of the digits or sum of powers of digits.
%e A114570 E.g. a(1247) = 32 since 1^4 + 2^3 + 4^2 + 7^1 = 1 + 8 + 16 + 7 = 32.
%p A114570 for n from 0 to 7 do seq(n^2+j^1, j=0..9 ); od; - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), 
               Nov 06 2006
%Y A114570 Sequence in context: A076314 A007953 A080463 this_sequence A115026 A101337 
               A135208
%Y A114570 Adjacent sequences: A114567 A114568 A114569 this_sequence A114571 A114572 
               A114573
%K A114570 nonn,base
%O A114570 1,2
%A A114570 Sergio Pimentel (ferdiego(AT)cox.net), Feb 16 2006

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