%I #16 Nov 01 2013 17:08:33

%S 1,8,10,8,19,26,19,26,37,35,37,62,64,71,46,62,73,80,82,80,82,89,109,

%T 89,109,125,100,107,118,107,118,125,127,107,118,125,145,143,145,152,

%U 172,170,172,188,181,170,190,215,172,215,235,233,217,215

%N Sum of digits of 8^n.

%H Harry J. Smith, <a href="/A066004/b066004.txt">Table of n, a(n) for n = 0..1000</a>

%F a(n) = A007953(A001018(n)). - _Michel Marcus_, Nov 01 2013

%t Table[Total[IntegerDigits[8^n]], {n, 0, 60}] (* _Vincenzo Librandi_, Oct 08 2013 *)

%o (PARI) SumD(x)= { local(s=0); while (x>9, s+=x%10; x\=10); return(s + x) } { for (n=0, 1000, a=SumD(8^n); write("b066004.txt", n, " ", a) ) } \\ _Harry J. Smith_, Nov 06 2009

%o (PARI) a(n) = sumdigits(8^n); \\ _Michel Marcus_, Nov 01 2013

%Y Cf. sum of digits of k^n: A001370 (k=2), A004166 (k=3), A065713 (k=4), A066001 (k=5), A066002 (k=6), A066003(k=7), this sequence (k=8), A065999 (k=9), A066005 (k=11), A066006 (k=12), A175527 (k=13).

%K nonn,base

%O 0,2

%A _N. J. A. Sloane_, Dec 11 2001