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Array read by rows: each row is a sequence of numbers k such that n^k does not contain the digit n.
3

%I #2 Mar 30 2012 17:26:27

%S 0,2,3,4,6,12,14,16,20,22,23,26,34,35,36,39,42,46,54,64,74,83,168,0,2,

%T 3,4,6,7,8,10,11,14,19,27,28,34,40,50,55,84,0,2,4,8,12,20,0,0,0,2,3,4,

%U 7,16,22,24,39,0,2,3,4,6,7,8,26,0,2,4,6,8,10,16,28

%N Array read by rows: each row is a sequence of numbers k such that n^k does not contain the digit n.

%C Last values in each row are 168,84,20,0,0,39,26,28 (all terms highly probably correct).

%e Each row is sequence of numbers k such that n^k does not contain the digit n (all rows probably finite, checked up to k=10^4), n=2..9:

%e 0,2,3,4,6,12,14,16,20,22,23,26,34,35,36,39,42,46,54,64,74,83,168 (A034293)

%e 0,2,3,4,6,7,8,10,11,14,19,27,28,34,40,50,55,84 (A131629)

%e 0,2,4,8,12,20

%e 0,

%e 0,

%e 0,2,3,4,7,16,22,24,39

%e 0,2,3,4,6,7,8,26

%e 0,2,4,6,8,10,16,28.

%Y Cf. A034293, A131629.

%K base,fini,full,nonn,tabf

%O 0,2

%A _Zak Seidov_, Mar 20 2008