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 A166057 Integers of the form 4n+3 for which Sum_{i=1..u} J(i,4n+3) obtains value zero exactly 7 times, when u ranges from 1 to (4n+3). Here J(i,k) is the Jacobi symbol. 2
 415, 1639, 2359, 3995, 5191, 5459, 7567, 7811, 8315, 8459, 8479, 9611, 9895, 9943, 11159, 12271, 12731, 12851, 13835, 14447, 15155, 15251, 16091, 17891, 18143, 18319, 21059, 21755, 23055, 23411, 23435, 23815, 24395, 24535, 26143, 27179 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Fourth row of A166092. LINKS CROSSREFS a(n) = A004767(A166056(n)). Sequence in context: A190028 A184545 A096032 * A306381 A172779 A056068 Adjacent sequences:  A166054 A166055 A166056 * A166058 A166059 A166060 KEYWORD nonn AUTHOR Antti Karttunen, Oct 08 2009 STATUS approved

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Last modified October 18 00:21 EDT 2019. Contains 328135 sequences. (Running on oeis4.)