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From fundamental unit of Z[ (-d)^{1/4} ], where d runs over positive integers not of the form 4*k^4.
(Formerly M0203)
3

%I M0203 #22 Apr 24 2024 11:37:40

%S 0,-1,2,-2,1,36,1,-485,-27,-98,23,-86,-13,16,577,-16,-13823,14439374,

%T -9,1,-91167,25899588,-95,-4443,-125,-1414178,57,330206,-74879,

%U 1975104,6913,67,-33,64926,1351,-571878,-267790150327167,3745,-159

%N From fundamental unit of Z[ (-d)^{1/4} ], where d runs over positive integers not of the form 4*k^4.

%D N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

%H Johannes Buchmann, <a href="https://doi.org/10.1090/S0025-5718-1987-0866097-1">The computation of the fundamental unit of totally complex quartic orders</a>, Math. Comp. 48 (1987), 39-54.

%Y Cf. A006829, A006830, A006831.

%K sign,more

%O 1,3

%A _N. J. A. Sloane_

%E Name clarified and few more terms from Buchmann added by _Andrey Zabolotskiy_, Apr 24 2024