A070463 -id:A070463 - cp's OEIS frontend

A010402 Squares mod 41.

0, 1, 2, 4, 5, 8, 9, 10, 16, 18, 20, 21, 23, 25, 31, 32, 33, 36, 37, 39, 40

Offset: 1

A070463 sorted, duplicates removed. - R. J. Mathar, Jan 12 2024

Union[PowerMod[Range[41], 2, 41]] (* Vincenzo Librandi, Dec 27 2019 *)

[quadratic_residues(41)] # Zerinvary Lajos, May 24 2009

A070464 a(n) = n^2 mod 42.

Original entry on oeis.org

0, 1, 4, 9, 16, 25, 36, 7, 22, 39, 16, 37, 18, 1, 28, 15, 4, 37, 30, 25, 22, 21, 22, 25, 30, 37, 4, 15, 28, 1, 18, 37, 16, 39, 22, 7, 36, 25, 16, 9, 4, 1, 0, 1, 4, 9, 16, 25, 36, 7, 22, 39, 16, 37, 18, 1, 28, 15, 4, 37, 30, 25, 22, 21, 22, 25, 30, 37, 4, 15, 28, 1, 18, 37, 16, 39

Offset: 0

N. J. A. Sloane, May 12 2002

Vincenzo Librandi, Table of n, a(n) for n = 0..1400
Index entries for linear recurrences with constant coefficients, signature (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1).

Cf. A070461, A070462, A070463.

[n^2 mod 42: n in [0..80]]; // Vincenzo Librandi, Apr 27 2011

Table[Mod[n^2,42],{n,0,200}] (* Vladimir Joseph Stephan Orlovsky, Apr 27 2011 *)
PowerMod[Range[0,80],2,42] (* Harvey P. Dale, Mar 13 2019 *)

a(n)=n^2%42 \\ Charles R Greathouse IV, Apr 06 2016

a(n) = a(n-42). - G. C. Greubel, Mar 25 2016

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A010402 Squares mod 41.

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A070464 a(n) = n^2 mod 42.

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