OFFSET
1,2
COMMENTS
A109015(a(n)) < 12.
121 (in decimal) is a member of this sequence but not a member of A023805. - Robert Munafo, Jan 26 2010
80 is a member of this sequence but is not a member of A160453. - Franklin T. Adams-Watters, Jan 26 2010
LINKS
G. C. Greubel, Table of n, a(n) for n = 1..1000
FORMULA
From Chai Wah Wu, Jan 16 2020: (Start)
a(n) = a(n-1) + a(n-11) - a(n-12) for n > 12.
G.f.: x*(x^11 + x^10 + x^9 + x^8 + x^7 + x^6 + x^5 + x^4 + x^3 + x^2 + x + 1)/(x^12 - x^11 - x + 1). (End)
EXAMPLE
156 is in A023805 but not in this sequence. - Franklin T. Adams-Watters, Jan 26 2010
MATHEMATICA
Select[Table[n, {n, 200}], Mod[#, 12]!=0&] (* Vladimir Joseph Stephan Orlovsky, Feb 18 2011*)
CROSSREFS
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Nov 30 2009
STATUS
approved