OFFSET
1,1
COMMENTS
The indices of the records seem to be 4 and the odd integers.
FORMULA
Conjectures: (Start)
a(n) = 4*n^2-12*n+5 for n>3.
a(n) = 3*a(n-1)-3*a(n-2)+a(n-3) for n>6.
G.f.: x*(3-4*x+15*x^3-5*x^4-x^5) / (1-x)^3.
(End)
CROSSREFS
KEYWORD
nonn
AUTHOR
Colin Barker, Sep 15 2016
STATUS
approved