OFFSET
1,2
COMMENTS
First differences of A160117.
It appears that one of the bisections is A008574. - Omar E. Pol, Sep 20 2011
LINKS
Paolo Xausa, Table of n, a(n) for n = 1..10000
N. J. A. Sloane, Catalog of Toothpick and Cellular Automata Sequences in the OEIS
Index entries for linear recurrences with constant coefficients, signature (0,2,0,-1).
FORMULA
G.f.: x*(x^2+1)*(4*x^3 + x^2 + 8*x + 1) / ((x-1)^2*(x+1)^2). - Colin Barker, Mar 04 2013
From Colin Barker, Apr 06 2013: (Start)
a(n) = -11 - 9*(-1)^n + (7 + 5*(-1)^n)*n for n > 2.
a(n) = 2*a(n-2) - a(n-4) for n > 6. (End)
MATHEMATICA
LinearRecurrence[{0, 2, 0, -1}, {1, 8, 4, 28, 8, 52}, 100] (* Paolo Xausa, Sep 01 2023 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Omar E. Pol, Jun 13 2009
EXTENSIONS
a(10)-a(27) from Omar E. Pol, Mar 26 2011
More terms from Colin Barker, Apr 06 2013
STATUS
approved