Search: id:A054842
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%I A054842
%S A054842 1,2,4,8,16,32,64,128,256,512,3,6,12,24,48,96,192,384,768,1536,9,18,36,
%T A054842 72,144,288,576,1152,2304,4608,27,54,108,216,432,864,1728,3456,6912,
%U A054842 13824,81,162,324,648,1296,2592,5184,10368,20736,41472,243,486,972
%N A054842 If n = a + 10 * b + 100 * c + 1000 * d + ... then a(n) = (2^a) * (3^b) 
               * (5^c) * (7^d) * ...
%C A054842 a((10^k-1)/9) = Primorial (k)= A061509((10^k-1)/9). This is a rearrangement 
               of whole numbers. a(m) = a(n) iff m = n. (Unlike A061509, in which 
               a(n) = a(n*10^k)).) - Amarnath Murthy and Meenakshi Srikanth (amarnath_murthy(AT)yahoo.com), 
               Jul 14 2003
%e A054842 a(15)=96 because 3^1 * 2^5 = 3*32 = 96
%Y A054842 Cf. A054841, A085840.
%Y A054842 Sequence in context: A061509 A086066 A085941 this_sequence A101440 A126605 
               A072049
%Y A054842 Adjacent sequences: A054839 A054840 A054841 this_sequence A054843 A054844 
               A054845
%K A054842 base,nonn
%O A054842 0,2
%A A054842 Henry Bottomley (se16(AT)btinternet.com), Apr 11 2000

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