A262024 Positive fundamental solution x0 corresponding to the even y0 = 2*A261250 of the Pell equation x^2 - D y^2 = +1.

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

Offset: 1

Author

Wolfdieter Lang, Sep 16 2015

Keywords

• nonn

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

Examples

			See A261250.
		

Crossrefs

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