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 A096013 Irregular triangle read by rows: row n lists quadratic nonresidues modulo n. 10
 2, 2, 3, 2, 3, 2, 5, 3, 5, 6, 2, 3, 5, 6, 7, 2, 3, 5, 6, 8, 2, 3, 7, 8, 2, 6, 7, 8, 10, 2, 3, 5, 6, 7, 8, 10, 11, 2, 5, 6, 7, 8, 11, 3, 5, 6, 10, 12, 13, 2, 3, 5, 7, 8, 11, 12, 13, 14, 2, 3, 5, 6, 7, 8, 10, 11, 12, 13, 14, 15, 3, 5, 6, 7, 10, 11, 12, 14, 2, 3, 5, 6, 8, 11, 12, 14, 15, 17, 2, 3, 8 (list; graph; refs; listen; history; text; internal format)
 OFFSET 3,1 COMMENTS The length of row n is A095972(n). LINKS T. D. Noe, Rows n = 3..100, flattened Eric Weisstein's World of Mathematics, Quadratic Nonresidue EXAMPLE Triangle starts:   2;   2, 3;   2, 3;   2, 5;   3, 5, 6;   2, 3, 5, 6, 7;   2, 3, 5, 6, 8;   ... MATHEMATICA (* As a Triangle *) Table[Complement[Range[n - 1], Mod[Range[n/2]^2, n]], {n, 3, 30}] // Column (* Mo Li, Sep 01 2019 *) PROG (PARI) isA096013(n, m)={local(r); r=1; for(i=0, floor(m/2), if(i^2%m==n, r=0)); r} \\ Michael B. Porter, May 05 2010 CROSSREFS Cf. A095972. Sequence in context: A339502 A342821 A165916 * A072380 A144910 A080330 Adjacent sequences:  A096010 A096011 A096012 * A096014 A096015 A096016 KEYWORD nonn,tabf AUTHOR Cino Hilliard, Jul 21 2004 EXTENSIONS Edited by Don Reble, May 07 2006 STATUS approved

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Last modified May 17 22:15 EDT 2021. Contains 343992 sequences. (Running on oeis4.)