OFFSET
0,1
FORMULA
a(n) = floor(a(n-1)^2/a(n-2)), a(0) = 3, a(1) = 16.
Conjectures: (Start)
G.f.: (3 - 2*x + x^2 - x^3)/(1 - 6*x + 4*x^2 - 2*x^3 + 2*x^4).
a(n) = 6*a(n-1) - 4*a(n-2) + 2*a(n-3) - 2*a(n-4). (End)
MATHEMATICA
RecurrenceTable[{a[0] == 3, a[1] == 16, a[n] == Floor[a[n - 1]^2/a[n - 2]]}, a, {n, 25}]
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Ilya Gutkovskiy, Nov 26 2016
STATUS
approved