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A062803
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Number of non-congruent solutions to x^2 - y^2 = 0 mod n.
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4
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1, 2, 5, 8, 9, 10, 13, 24, 21, 18, 21, 40, 25, 26, 45, 64, 33, 42, 37, 72, 65, 42, 45, 120, 65, 50, 81, 104, 57, 90, 61, 160, 105, 66, 117, 168, 73, 74, 125, 216, 81, 130, 85, 168, 189, 90, 93, 320, 133, 130, 165, 200, 105, 162, 189, 312, 185, 114, 117, 360, 121, 122, 273
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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COMMENTS
| a(n) is multiplicative and, for an odd prime p, a(p) = 2*p - 1.
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FORMULA
| Multiplicative with a(2^e)=e*2^e and a(p^e)=((p-1)*e+p)*p^(e-1) for an odd prime p. - Vladeta Jovovic (vladeta(AT)eunet.rs), Sep 22 2003
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CROSSREFS
| Cf. A086933.
Sequence in context: A085254 A068537 A047620 * A153275 A161154 A174438
Adjacent sequences: A062800 A062801 A062802 * A062804 A062805 A062806
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KEYWORD
| nonn,mult
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AUTHOR
| Ahmed Fares (ahmedfares(AT)my-deja.com), Jul 19 2001
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EXTENSIONS
| More terms from Vladeta Jovovic (vladeta(AT)eunet.rs), Sep 22 2003
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