1,11

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

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

Cf. A055238-A055242.

Sequence in context: A103638 A129821 A126836 * A055242 A200295 A089389

Adjacent sequences: A055238 A055239 A055240 * A055242 A055243 A055244

base,nonn

Henry Bottomley, May 04 2000

approved