A259453 The y value of the unique nontrivial solution to x^3 + d*y^3 = 1 for all admissible (d = 2,7,9,17,..., A005988).

1, -1, 1, -7, 3, 7, -1, 1, -3, 2, -1, 1, -2, -1, 1, 3, -1, 1, -3, -1, 1, 2, -1, 1, -2, -42, 3, -1, 1, -3, -1, 1, -1, 1, 2, 3, 6, -1, 1, -6, -3, -2, -1, 1, -1, 1, 3, -1, 1, -3, 2, 4, -1, 1, -4, -2, -1, 1, -21, 3, -1, 1, -3, -1, 1, 2, -1, 1, -2, 3

Offset

1,4

References

H. C. Williams and C. R. Zarnke, Computation of the solutions of the Diophantine equation x^3+dy^3=1, Proc. Conf. Numerical Maths., Winnipeg (1971), 671-676.

Links

Sean A. Irvine, Table of n, a(n) for n = 1..135

H. C. Williams and C. R. Zarnke, Computation of the solutions of the Diophantine equation x^3+dy^3=1, Proc. Conf. Numerical Maths., Winnipeg (1971), 671-676. (Annotated scanned copy)

H. C. Williams and R. Holte, Computation of the solution of x^3 + D y^3 = 1, Mathematics of Computation, Vol. 31, No. 139. (Jul., 1977), pp. 778-785.

Crossrefs

Cf. A005988, A055735 (x values).

Sequence in context: A253891 A309612 A021856 * A096715 A242939 A242938

Adjacent sequences: A259450 A259451 A259452 * A259454 A259455 A259456

Keyword

sign

Author

N. J. A. Sloane, Jun 28 2015

Extensions

More terms from Sean A. Irvine, Nov 17 2016

Status

approved