OFFSET
1,2
LINKS
Index entries for linear recurrences with constant coefficients, signature (9,0,0,1,-9).
FORMULA
G.f.: ( x*(1+2*x+3*x^3) ) / ( (x-1)*(9*x-1)*(1+x)*(x^2+1) ). - R. J. Mathar, Oct 11 2015
E.g.f.: (-160*cos(x) - 287*cosh(x) + 447*cosh(9*x) + 200*sin(x) - 943*sinh(x) + 447*sinh(9*x))/3280. - Stefano Spezia, Jul 27 2024
MATHEMATICA
Module[{nn=20, b9}, b9=PadRight[{}, nn, {1, 2, 0, 3}]; Table[FromDigits[ Take[ b9, n], 9], {n, nn}]] (* Harvey P. Dale, Feb 28 2016 *)
CROSSREFS
KEYWORD
nonn,base,easy
AUTHOR
EXTENSIONS
a(18)-a(22) from Stefano Spezia, Jul 27 2024
STATUS
approved