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a(n) is the imaginary part of f(n) (as defined in A330780).
2

%I #7 Jan 06 2020 09:15:30

%S 0,1,5,9,11,9,3,-3,-6,-3,3,9,12,8,2,-4,-8,-4,4,12,16,12,4,-6,-10,-6,2,

%T 10,14,10,0,-8,-12,-7,3,13,18,13,3,-7,-13,-8,2,12,17,11,1,-9,-14,-9,1,

%U 11,17,12,2,-8,-13,-8,4,14,20,14,2,-10,-16,-10,2,16,22

%N a(n) is the imaginary part of f(n) (as defined in A330780).

%H Rémy Sigrist, <a href="/A331005/b331005.txt">Table of n, a(n) for n = 0..10000</a>

%H Rémy Sigrist, <a href="/A331005/a331005.gp.txt">PARI program for A331005</a>

%o (PARI) See Links section.

%Y Cf. A330780.

%K sign

%O 0,3

%A _Rémy Sigrist_, Jan 05 2020