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A010451 Squares mod 90. 0
0, 1, 4, 9, 10, 16, 19, 25, 31, 34, 36, 40, 45, 46, 49, 54, 55, 61, 64, 70, 76, 79, 81, 85 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..24.

MATHEMATICA

With[{b = 90}, Union@ Array[Mod[#^2, b] &, b]] (* Michael De Vlieger, Jul 06 2018 *)

PROG

(Sage) [quadratic_residues(90)] # Zerinvary Lajos, May 28 2009

CROSSREFS

Sequence in context: A007936 A050943 A010406 * A080064 A260963 A243188

Adjacent sequences:  A010448 A010449 A010450 * A010452 A010453 A010454

KEYWORD

nonn,fini,full

AUTHOR

N. J. A. Sloane

STATUS

approved

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Last modified August 20 15:07 EDT 2019. Contains 326152 sequences. (Running on oeis4.)