OFFSET
0,3
COMMENTS
The Berndt-type sequence number 11a for the argument 2Pi/9 - see A215945 for more details.
LINKS
Index entries for linear recurrences with constant coefficients, signature (0,0,105,0,0,33,0,0,-1).
FORMULA
G.f.: (1+x+11*x^2-70*x^3+10*x^4-26*x^5-11*x^6-3*x^7-x^8)/(1-105*x^3-33*x^6+x^9). [Bruno Berselli, Oct 02 2012]
PROG
(Magma) i:=24; I:=[3, 3, 11]; A:=[m le 3 select I[m] else 3*Self(m-1)+Self(m-2)-Self(m-3)/3: m in [1..i]]; [3^(-1+Floor(n/3))*A[n]: n in [1..i]]; // Bruno Berselli, Oct 02 2012
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Roman Witula, Aug 30 2012
STATUS
approved