A006828 From fundamental unit of Z[ (-d)^{1/4} ], where d runs over positive integers not of the form 4*k^4. (Formerly M0203)

0, -1, 2, -2, 1, 36, 1, -485, -27, -98, 23, -86, -13, 16, 577, -16, -13823, 14439374, -9, 1, -91167, 25899588, -95, -4443, -125, -1414178, 57, 330206, -74879, 1975104, 6913, 67, -33, 64926, 1351, -571878, -267790150327167, 3745, -159

Offset

1,3

References

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

Links

Table of n, a(n) for n=1..39.

Johannes Buchmann, The computation of the fundamental unit of totally complex quartic orders, Math. Comp. 48 (1987), 39-54.

Crossrefs

Cf. A006829, A006830, A006831.

Sequence in context: A019227 A163893 A199879 * A091752 A078078 A006831

Adjacent sequences: A006825 A006826 A006827 * A006829 A006830 A006831

Keyword

sign,more,changed

Author

N. J. A. Sloane

Extensions

Name clarified and few more terms from Buchmann added by Andrey Zabolotskiy, Apr 24 2024

Status

approved