A166865 Triangle read by rows: R(n,k)=prime(k)^(prime(n)-2) mod n, 1<=k<=n.

0, 0, 1, 2, 0, 2, 0, 3, 1, 3, 2, 3, 0, 2, 1, 2, 3, 5, 1, 5, 1, 1, 6, 6, 0, 1, 6, 6, 0, 3, 5, 7, 3, 5, 1, 3, 8, 0, 8, 1, 8, 1, 8, 1, 8, 8, 7, 5, 3, 1, 7, 3, 9, 7, 9, 6, 4, 9, 8, 0, 6, 2, 7, 1, 8, 5, 8, 3, 5, 7, 11, 1, 5, 7, 11, 5, 7, 1

Offset

1,4

Comments

Row sums: 0, 1, 4, 7, 8, 17, 26, 27, 43, 59, 56, 71, …, .

Links

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

Example

Triangle begins:
0,
0, 1,
2, 0, 2,
0, 3, 1, 3,
2, 3, 0, 2, 1,
2, 3, 5, 1, 5, 1,

Mathematica

t[n_, k_] := Mod[Prime@ k^(Prime@ n - 2), n]; Table[ t[n, k], {n, 12}, {k, n}] // Flatten

Crossrefs

Cf. A000079, A177226.

Sequence in context: A025804 A042961 A029190 * A300575 A029189 A035432

Adjacent sequences: A166862 A166863 A166864 * A166866 A166867 A166868

Keyword

nonn,tabl

Author

Juri-Stepan Gerasimov, Dec 16 2010

Status

approved