A028735 - OEIS

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A028735

Nonsquares mod 22.

1

2, 6, 7, 8, 10, 13, 17, 18, 19, 21

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Table of n, a(n) for n=1..10.

MATHEMATICA

Complement[Range[0, 21], PowerMod[Range[22], 2, 22]] (* Alonso del Arte, Dec 22 2019 *)

PROG

(Scala) (0 to 21).diff((1 to 22).map(n => (n * n) % 22)) // Alonso del Arte, Dec 22 2019

CROSSREFS

Sequence in context: A028774 A355160 A343719 * A267541 A325465 A047553

Adjacent sequences: A028732 A028733 A028734 * A028736 A028737 A028738

KEYWORD

nonn,fini,full,easy

AUTHOR

N. J. A. Sloane

EXTENSIONS

Incorrect term 11 removed by Alonso del Arte, Dec 22 2019

STATUS

approved