1,5

The table below shows n, the number of non-zero quadratic residues

(QRs) of n (A105612),the sum of the QRs of n and the non-zero QRs

of n (A046071) for n=1:10.

..n..num QNRs..sum QNRs.........QNRs

..1.........0.........0

..2.........1.........1.........1

..3.........1.........1.........1

..4.........1.........1.........1

..5.........2.........5.........1..4

..6.........3.........8.........1..3..4

..7.........3.........7.........1..2..4

..8.........2.........5.........1..4

..9.........3........12.........1..4..7

.10.........5........25.........1..4..5..6..9

Cf. A046071

Sequence in context: A047914 A005480 A021867 this_sequence A019845 A053787 A039678

Adjacent sequences: A165906 A165907 A165908 this_sequence A165910 A165911 A165912

nonn

Christopher Hunt Gribble (chris.eveswell(AT)virgin.net), Sep 30 2009