A048281 Beginning of first run of consecutive quadratic residues mod prime(n) of longest length.

0, 0, 4, 0, 3, 12, 15, 4, 0, 4, 7, 9, 39, 13, 0, 9, 25, 12, 21, 0, 69, 18, 25, 87, 93, 19, 13, 9, 25, 49, 68, 58, 14, 34, 4, 16, 9, 53, 61, 33, 12, 11, 0, 189, 59, 61, 78, 28, 73, 42, 28, 0, 235, 63, 57, 31, 51, 77, 83, 31, 89, 53, 99, 0, 309, 36, 120, 333, 323, 121, 164, 44, 207, 36, 19, 200, 62, 33

Offset

1,3

Links

Table of n, a(n) for n=1..78.

Example

The numbers 0, 1, 4, 5, 6, 9, 10, 11, 14, . . . are the squares mod 5, and 5 = prime(3), so a(3) = 4. - Jonathan Sondow, Jul 20 2014

Crossrefs

Cf. A048280.

Sequence in context: A048649 A200008 A086751 * A066273 A028650 A028634

Adjacent sequences: A048278 A048279 A048280 * A048282 A048283 A048284

Keyword

nonn

Author

David W. Wilson

Extensions

Offset corrected to 1, definition clarified, Jonathan Sondow Jul 20 2014

Status

approved