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A065004 100 written in base n, or -1 if such a representation does not exist. 2

%I

%S 1111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111,

%T 1100100,10201,1210,400,244,202,144,121,100,91,84,79,72,-1,64,-1,-1,

%U 55,50,-1,-1,48,44,40,-1,-1,-1,-1,-1,37,34,31,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,28,26,24,22,20,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,19,18,17,16,15,14,13,12,11,10

%N 100 written in base n, or -1 if such a representation does not exist.

%C The term 111....1111 should officially be called the "unary expansion", since in base 1 only the digit 0 may appear.

%C Terms exist for some bases up to 100. - T. D. Noe, Mar 09 2012

%t Table[s = IntegerDigits[100, n]; If[Max[s] > 9, -1, FromDigits[s]], {n, 2, 100}] (* _T. D. Noe_, Mar 09 2012 *)

%Y Cf. A065147, A208090 (100 in base -n).

%K base,sign,fini,full

%O 1,1

%A _Bodo Zinser_, Nov 19 2001

%E Extended by T. D. Noe, Mar 09 2012

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Last modified March 8 07:56 EST 2021. Contains 341941 sequences. (Running on oeis4.)