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Invitation: celebrating 50 years of OEIS, 250000 sequences, and Sloane's 75th, there will be a conference at DIMACS, Rutgers, Oct 9-10 2014.

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A028902 Map n = Sum c_i 10^i to a(n) = Sum c_i 7^i. 2

%I

%S 0,1,2,3,4,5,6,7,8,9,7,8,9,10,11,12,13,14,15,16,14,15,16,17,18,19,20,

%T 21,22,23,21,22,23,24,25,26,27,28,29,30,28,29,30,31,32,33,34,35,36,37,

%U 35,36,37,38,39,40,41,42,43,44,42,43,44,45,46,47,48,49,50,51,49,50,51,52

%N Map n = Sum c_i 10^i to a(n) = Sum c_i 7^i.

%K nonn,base

%O 0,3

%A _N. J. A. Sloane_.

%E More terms from _Erich Friedman_.

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Last modified September 23 18:22 EDT 2014. Contains 247183 sequences.