OFFSET
1,22
FORMULA
EXAMPLE
a(36)=3 since 36 is 3-digit number in bases 4,5,6 and 63 is 3-digit number in bases 4,5,6,7 such that we have 3 common bases.
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Vladimir Shevelev, May 30 2011
STATUS
approved