OFFSET
1,1
COMMENTS
If we are ever going to understand A268236 then we need to understand this sequence first.
Based on Nathan Fox's extended table in A268236.
Equivalently, numbers 4k (k>5) whose representations in bases 5 through k-2 each contain at most one 4.
Equivalently, numbers 4k (k>5) whose representations in integer bases less than sqrt(4k) each contain at most one 4.
Is this sequence infinite?
LINKS
Nathan Fox, Table of n, a(n) for n = 1..507
CROSSREFS
KEYWORD
nonn,base
AUTHOR
STATUS
approved