A114390 a(n) = A065621(n^2).

1, 4, 25, 16, 41, 100, 81, 64, 241, 164, 137, 400, 505, 324, 289, 256, 865, 964, 953, 656, 713, 548, 1585, 1600, 1681, 2020, 1897, 1296, 1497, 1156, 1089, 1024, 3265, 3460, 3417, 3856, 4073, 3812, 3601, 2624, 2993, 2852, 2377, 2192, 2105, 6340

Offset: 1

Author

Antti Karttunen, Feb 07 2006

Keywords

• nonn

Crossrefs

Cf. A000290, A065621.

A114391 gives the positions where a(n) is square, A114392 gives the corresponding values (squares) and A114393 gives their square roots.

Programs

Python

def A114390(n): return (m:=n**2)^ (m&~-m)<<1 # Chai Wah Wu, Jun 29 2022

Formula

a(n) = A065621(A000290(n)).