A071958 Numbers m such that Sum_{i=1..m} K(m,i) < 0 where K(x,y) is the Kronecker symbol (x/y).

67, 99, 115, 147, 163, 187, 267, 275, 283, 307, 315, 355, 379, 403, 427, 475, 507, 523, 531, 595, 619, 643, 675, 747, 763, 787, 883, 907, 931, 947, 955, 975, 1003, 1027, 1107, 1123, 1147, 1179, 1203, 1267, 1275, 1347, 1363, 1387, 1395, 1435, 1467, 1475

Offset

1,1

Links

Robert G. Wilson v, Table of n, a(n) for n = 1..1000

Mathematica

f[n_] := Sum[ KroneckerSymbol[n, k], {k, n}]; Select[ Range@ 1500, f[#] < 0 &] (* Robert G. Wilson v, Mar 21 2015 *)

Prog

(PARI) for(n=1, 1800, if(sum(i=1, n, kronecker(n, i))<0, print1(n, ", ")))

Crossrefs

Cf. A071961.

Sequence in context: A260806 A180557 A127732 * A128197 A140541 A136077

Adjacent sequences: A071955 A071956 A071957 * A071959 A071960 A071961

Keyword

easy,nonn

Author

Benoit Cloitre, Jun 16 2002

Status

approved