A088156 Value of n-th digit in vigesimal representation of n^n.

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, 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, 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

Offset

0,22

Comments

a(n)=d(n) with n^n = Sum(d(k)*20^k: 0<=d(k)<20, k>=0).

Links

Table of n, a(n) for n=0..87.

Eric Weisstein's World of Mathematics, Vigesimal

Formula

a(n) = floor(n^n / 20^n) mod 20.

Example

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.

Crossrefs

Cf. A000312, A088150, A088151, A088152, A088153, A088154, A088155, A088157.

Sequence in context: A035302 A104772 A264142 * A019193 A369178 A253884

Adjacent sequences: A088153 A088154 A088155 * A088157 A088158 A088159

Keyword

nonn,base

Author

Reinhard Zumkeller, Sep 20 2003

Status

approved