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A046071
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Triangle of nonzero quadratic residues mod n.
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6
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1, 1, 1, 1, 4, 1, 3, 4, 1, 2, 4, 1, 4, 1, 4, 7, 1, 4, 5, 6, 9, 1, 3, 4, 5, 9, 1, 4, 9, 1, 3, 4, 9, 10, 12, 1, 2, 4, 7, 8, 9, 11, 1, 4, 6, 9, 10, 1, 4, 9, 1, 2, 4, 8, 9, 13, 15, 16, 1, 4, 7, 9, 10, 13, 16, 1, 4, 5, 6, 7, 9, 11, 16, 17, 1, 4, 5, 9, 16, 1, 4, 7, 9, 15, 16, 18, 1, 3, 4, 5, 9, 11, 12
(list; graph; refs; listen; history; internal format)
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OFFSET
| 2,5
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COMMENTS
| Rows start with 1's.
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LINKS
| T. D. Noe, Rows n = 1..100, flattened
Eric Weisstein's World of Mathematics, Quadratic Residue.
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PROG
| (PARI) residue(n, m)={local(r); r=0; for(i=0, floor(m/2), if(i^2%m==n, r=1)); r} [From Michael B. Porter (michael_b_porter(AT)yahoo.com), May 03 2010]
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CROSSREFS
| Cf. A096008 (including zeros), A105612 (row lengths), A063987.
Sequence in context: A177951 A061903 A084118 * A078147 A058303 A090724
Adjacent sequences: A046068 A046069 A046070 * A046072 A046073 A046074
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KEYWORD
| easy,nonn,tabf
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AUTHOR
| Eric Weisstein (eric(AT)weisstein.com)
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EXTENSIONS
| Edited by Franklin T. Adams-Watters (FrankTAW(AT)Netscape.net), Nov 07 2006
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