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A054615 a(n) = Sum_{d|n} phi(d)*8^(n/d). 1

%I

%S 0,8,72,528,4176,32800,262800,2097200,16781472,134218800,1073774880,

%T 8589934672,68719748256,549755813984,4398048608688,35184372156480,

%U 281474993496384,2251799813685376,18014398644225456,144115188075856016

%N a(n) = Sum_{d|n} phi(d)*8^(n/d).

%Y Column k=8 of A185651.

%K nonn

%O 0,2

%A _N. J. A. Sloane_, Apr 16 2000

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Last modified October 18 22:26 EDT 2019. Contains 328211 sequences. (Running on oeis4.)