|
%I #4 Mar 30 2012 18:50:38
%S 1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,2,8,4,19,4,17,3,7,6,11,5,3,
%T 6,5,13,8,15,19,4,16,2,12,5,5,9,6,5,9,17,1,14,11,10,15,15,13,2,8,9,1,
%U 18,3,15,15,17,10,1,5,0,3,16,4,17,14,12,12,6,5,8,16,8,3,6,12,19,2,14
%N Value of n-th digit in vigesimal representation of n^n.
%C a(n)=d(n) with n^n = Sum(d(k)*20^k: 0<=d(k)<20, k>=0).
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/Vigesimal.html">Vigesimal</a>
%F a(n) = floor(n^n / 20^n) mod 20.
%e n=30, 30^30=205891132094649*10^30 -> [93B83A81A7CBBA03C2241239C3C4840000000], a(30)=8.
%e a(0)=1, a(k)=0 for 0<k<20 and a(20)=1.
%Y Cf. A000312, A088150, A088151, A088152, A088153, A088154, A088155, A088157.
%K nonn,base
%O 0,22
%A _Reinhard Zumkeller_, Sep 20 2003
|
