OFFSET
0,3
COMMENTS
The period is essentially the reversal of the period in A156194.
The first 7 elements of the period (1, 1, 4, 2, 4, 1, 1) are palindromic and the other 5, (2, 7, 1, 7, 2), too.
LINKS
Index entries for linear recurrences with constant coefficients, signature (0,0,0,0,0,0,0,0,0,0,0,1).
FORMULA
a(n) = A156094(n) mod 9.
a(n) = A156194(n+6).
G.f.: (1 + x + 4*x^2 + 2*x^3 + 4*x^4 + x^5 + x^6 + 2*x^7 + 7*x^8 + x^9 + 7*x^10 + 2*x^11)/( (1-x) * (1+x+x^2) * (1+x) * (1-x+x^2) * (1+x^2) * (x^4-x^2+1)). - R. J. Mathar, Nov 22 2009
MATHEMATICA
LinearRecurrence[{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1}, {1, 1, 4, 2, 4, 1, 1, 2, 7, 1, 7, 2}, 105] (* Ray Chandler, Aug 08 2015 *)
PadRight[{}, 110, {1, 1, 4, 2, 4, 1, 1, 2, 7, 1, 7, 2}] (* Harvey P. Dale, Sep 14 2020 *)
CROSSREFS
KEYWORD
nonn,easy,less
AUTHOR
Paul Curtz, Feb 05 2009
EXTENSIONS
Edited by R. J. Mathar, Nov 22 2009
STATUS
approved