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A262024 Positive fundamental solution x0 corresponding to the even y0 = 2*A261250 of the Pell equation x^2 - D y^2 = +1. 3
3, 9, 5, 19, 7, 649, 15, 33, 17, 9, 55, 197, 51, 127, 9801, 11, 23, 35, 73, 37, 25, 2049, 13, 199, 161, 24335, 99, 649, 66249, 485, 89, 15, 151, 19603, 31, 1766319049, 63, 129, 65, 33, 7775, 251, 17, 2281249, 3699, 57799, 351, 53, 163, 55, 285769, 10405, 500001, 19, 1151, 12151, 2143295, 39, 62809633, 99, 201, 101, 41, 32080051, 1351, 158070671986249, 21, 295, 127, 1204353, 1025, 9801, 649, 306917 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

This is a proper subset of A033313 corresponding to the even members of A033317.

The D values coincide apparently with A007969 (Conway's rectangular numbers).

For a proof of this coincidence see the W. Lang link under A007969. - Wolfdieter Lang, Oct 04 2015

LINKS

Table of n, a(n) for n=1..74.

EXAMPLE

See A261250.

CROSSREFS

Cf. A000037, A033313, A033317, A261250, A007969.

Sequence in context: A338350 A088898 A143218 * A252117 A103934 A186814

Adjacent sequences:  A262021 A262022 A262023 * A262025 A262026 A262027

KEYWORD

nonn

AUTHOR

Wolfdieter Lang, Sep 16 2015

STATUS

approved

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Last modified May 6 01:51 EDT 2021. Contains 343579 sequences. (Running on oeis4.)