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A055241 Smallest base in which n is not divisible by any of its digits (0 if no such base). 0
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 0, 5, 0, 0, 0, 5, 0, 5, 0, 8, 6, 5, 0, 7, 7, 10, 0, 6, 0, 7, 9, 7, 6, 4, 0, 7, 7, 7, 11, 7, 0, 4, 12, 16, 7, 4, 0, 9, 11, 9, 9, 5, 10, 8, 10, 10, 9, 4, 0, 8, 8, 11, 11, 5, 14, 5, 9, 9, 11, 9, 13, 5, 10, 11, 10, 5, 10, 5, 11, 11, 11, 10, 15, 5, 10, 10, 13, 5, 19 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,11

LINKS

Table of n, a(n) for n=1..90.

EXAMPLE

a(11)=4 because it is written as 111111111111 in base 1, 1011 in base 2, 102 in base 3 and 23 in base 4; 11 is divisible by 1 but not by 2 or 3

CROSSREFS

Cf. A055238-A055242.

Sequence in context: A103638 A129821 A126836 * A055242 A200295 A089389

Adjacent sequences:  A055238 A055239 A055240 * A055242 A055243 A055244

KEYWORD

base,nonn

AUTHOR

Henry Bottomley, May 04 2000

STATUS

approved

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Last modified October 17 15:32 EDT 2019. Contains 328116 sequences. (Running on oeis4.)