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0,22
a(n)=d(n) with n^n = Sum(d(k)*20^k: 0<=d(k)<20, k>=0).
Table of n, a(n) for n=0..87.
Eric Weisstein's World of Mathematics, Vigesimal
a(n) = floor(n^n / 20^n) mod 20.
n=30, 30^30=205891132094649*10^30 -> [93B83A81A7CBBA03C2241239C3C4840000000], a(30)=8.
a(0)=1, a(k)=0 for 0<k<20 and a(20)=1.
Cf. A000312, A088150, A088151, A088152, A088153, A088154, A088155, A088157.
Sequence in context: A035302 A104772 A264142 * A019193 A253884 A054788
Adjacent sequences: A088153 A088154 A088155 * A088157 A088158 A088159
nonn,base
Reinhard Zumkeller, Sep 20 2003
approved