A089019 - OEIS

A089019

First nontrivial x satisfying x^2 - 3*y^2 = d^2, where d=A072330(n).

2, 13, 14, 26, 38, 49, 62, 67, 79, 74, 86, 103, 109, 133, 122, 158, 146, 181, 194, 194, 182, 182, 193, 199, 259, 278, 247, 266, 278, 254, 266, 301, 301, 314, 362, 338, 379, 373, 367, 427, 458, 403, 434, 458, 422, 446, 433, 434, 518, 511, 494, 482, 487, 523

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Jean-François Alcover, Table of n, a(n) for n = 1..999

FORMULA

a(n) = A086909(n)/2.

MATHEMATICA

Cases[Import["https://oeis.org/A086909/b086909.txt", "Table"], {_, _}][[All, 2]]/2 (* Jean-François Alcover, Mar 07 2020 *)

CROSSREFS

For corresponding y see A089020.

Cf. A072330, A072360, A086909, A089020, A096672, A096673, A096674.