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First term of n-th difference sequence of (floor(k*r)), r = -sqrt(5), k >= 0.
3

%I #12 Feb 20 2022 08:15:33

%S -3,1,-1,1,-2,6,-16,36,-72,136,-256,496,-992,2016,-4096,8256,-16512,

%T 32896,-65536,130816,-261631,523754,-1048323,2096152,-4183701,8324850,

%U -16480855,32363020,-62784775,119759850,-223346545,404492000,-705032195,1166803110

%N First term of n-th difference sequence of (floor(k*r)), r = -sqrt(5), k >= 0.

%H Clark Kimberling, <a href="/A325669/b325669.txt">Table of n, a(n) for n = 1..200</a>

%t Table[First[Differences[Table[Floor[-Sqrt[5]*n], {n, 0, 50}], n]], {n, 1, 50}]

%Y Cf. A325664, A325668.

%K easy,sign

%O 1,1

%A _Clark Kimberling_, May 13 2019