A261248 Positive fundamental solution y(n) of the generalized Pell equation X^2 - D(n) Y(n) = 2 with D(n) = A261246(n).

1, 1, 1, 1, 7, 1, 23, 1, 1, 7, 1, 151, 1, 47, 1, 193, 1, 3383, 7, 1, 217, 1, 9041, 17, 1, 7, 161, 1, 23, 20687, 1, 119, 233, 1, 437071, 617, 1, 7199, 20783, 7, 17, 137, 1, 593, 1, 497, 731153, 1839433, 79, 1, 326471, 7, 2863

Offset

1,5

Comments

For the corresponding positive fundamental solution x(n) see A261247(n).

[x(n), y(n)] gives the positive proper fundamental solution for D(n) = A261246(n), for n >= 1.

See the comments on A261246 for this generalized Pell equation.

Links

Table of n, a(n) for n=1..53.

Example

See A261246.

Crossrefs

Cf. A261246, A261247.

Sequence in context: A178445 A019431 A264615 * A214686 A211790 A064051

Adjacent sequences: A261245 A261246 A261247 * A261249 A261250 A261251

Keyword

nonn

Author

Wolfdieter Lang, Sep 06 2015

Status

approved