login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A010415 Squares mod 54. 1
0, 1, 4, 7, 9, 10, 13, 16, 19, 22, 25, 27, 28, 31, 34, 36, 37, 40, 43, 46, 49, 52 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..22.

MATHEMATICA

Union[PowerMod[Range[54], 2, 54]] (* Alonso del Arte, Dec 27 2019 *)

PROG

(Sage) [quadratic_residues(54)] # Zerinvary Lajos, May 24 2009

(Scala) (1 to 54).map(n => (n * n) % 54).toSet.toSeq.sorted // Alonso del Arte, Dec 27 2019

CROSSREFS

Cf. A028767.

Sequence in context: A056991 A242660 A010389 * A010442 A055047 A234429

Adjacent sequences:  A010412 A010413 A010414 * A010416 A010417 A010418

KEYWORD

nonn,fini,full,easy

AUTHOR

N. J. A. Sloane

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified September 27 21:12 EDT 2021. Contains 347698 sequences. (Running on oeis4.)