A333859 Integers k such that A269254(k) = -1.

7, 14, 23, 34, 47, 62, 79, 98, 110, 119, 123, 142, 167, 194, 223, 254, 287, 322, 359, 398, 439, 482, 488, 527, 574, 623, 674, 702, 727, 782, 839, 898, 959, 1022, 1087, 1154, 1223, 1294, 1298, 1367, 1442, 1519

Offset: 1

Author

Jinyuan Wang, Apr 08 2020

Keywords

• nonn
• hard
• more

Comments

A008865(m) = m^2 - 2 is a term for any m > 2, see A269254 for a proof. Also note that 110, 123, 488, 702, 1298, ... are not of the form m^2 - 2.

Links

• Andrew N. W. Hone, et al., On a family of sequences related to Chebyshev polynomials, arXiv:1802.01793 [math.NT], 2018.

Crossrefs

Cf. A008865, A269254.