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A217742 Numbers n with the property that if the base-8 representation of n is read backwards, the result is 5*n. 2

%I #12 Mar 23 2013 05:10:54

%S 525,4725,34125,38325,269325,307125,2150925,2184525,2423925,2457525,

%T 17203725,17506125,19358325,19660725,137626125,137894925,139810125,

%U 140078925,154833525,155102325,157017525,157286325

%N Numbers n with the property that if the base-8 representation of n is read backwards, the result is 5*n.

%e n = 525 (base 10) = 1015 (base 8). Reading this backwards we get 5101 (base 8) = 2625 (base 10) = 5*n, so 525 is in the sequence.

%Y Cf. A241927, A223089.

%K nonn,base

%O 1,1

%A _N. J. A. Sloane_, Mar 23 2013

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Last modified April 19 02:28 EDT 2024. Contains 371782 sequences. (Running on oeis4.)