OFFSET
1,1
COMMENTS
The term 111....1111 should officially be called the "unary expansion", since in base 1 only the digit 0 may appear.
LINKS
FORMULA
From Elmo R. Oliveira, Jun 15 2024: (Start)
G.f.: x*(111111-111001*x-90*x^2-8*x^3-x^4-x^5-4*x^6)/(1-x).
a(n) = 6 for n > 6. (End)
CROSSREFS
KEYWORD
nonn,base,easy
AUTHOR
N. J. A. Sloane, Jun 04 2004
STATUS
approved