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A060037 Triangular array T read by rows: T(n,k)=k^2 mod n, for k=1,2,...,[n/2], n=2,3,... 3
1, 1, 1, 0, 1, 4, 1, 4, 3, 1, 4, 2, 1, 4, 1, 0, 1, 4, 0, 7, 1, 4, 9, 6, 5, 1, 4, 9, 5, 3, 1, 4, 9, 4, 1, 0, 1, 4, 9, 3, 12, 10, 1, 4, 9, 2, 11, 8, 7, 1, 4, 9, 1, 10, 6, 4, 1, 4, 9, 0, 9, 4, 1, 0, 1, 4, 9, 16, 8, 2, 15, 13, 1, 4, 9, 16, 7, 0, 13, 10, 9, 1, 4, 9, 16, 6, 17, 11, 7, 5, 1, 4, 9, 16, 5, 16 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,6

LINKS

T. D. Noe, Rows n=2..100 of triangle, flattened

EXAMPLE

1; 1; 1,0; 1,4; 1,4,3; 1,4,2; ...

MATHEMATICA

Flatten[Table[PowerMod[k, 2, n], {n, 2, 20}, {k, Floor[n/2]}]] (* Harvey P. Dale, Mar 05 2012 *)

CROSSREFS

Cf. A048152, A060036.

Sequence in context: A324937 A049007 A016686 * A229705 A321593 A173259

Adjacent sequences:  A060034 A060035 A060036 * A060038 A060039 A060040

KEYWORD

nonn,tabf,easy,nice

AUTHOR

N. J. A. Sloane, Mar 17 2001

EXTENSIONS

More terms from Larry Reeves (larryr(AT)acm.org), Mar 20 2001

STATUS

approved

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Last modified May 31 13:01 EDT 2020. Contains 334748 sequences. (Running on oeis4.)