A141455 Irregular triangle showing the set of all possible values of primes modulo n in row n.

0, 1, 0, 1, 2, 1, 2, 3, 0, 1, 2, 3, 4, 1, 2, 3, 5, 0, 1, 2, 3, 4, 5, 6, 1, 2, 3, 5, 7, 1, 2, 3, 4, 5, 7, 8, 1, 2, 3, 5, 7, 9, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1, 2, 3, 5, 7, 11, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 1, 2, 3, 5, 7, 9, 11, 13, 1, 2, 3, 4, 5, 7, 8, 11, 13, 14, 1, 2, 3, 5, 7, 9, 11, 13, 15

Offset: 2

Author

Roger L. Bagula and Gary W. Adamson, Aug 07 2008

Keywords

• nonn
• tabf

Examples

			Table begins:0, 1;
0, 1, 2;
1, 2, 3;
0, 1, 2, 3, 4;
1, 2, 3, 5;
0, 1, 2, 3, 4, 5, 6;
1, 2, 3, 5, 7;
1, 2, 3, 4, 5, 7, 8;
1, 2, 3, 5, 7, 9;
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10;
1, 2, 3, 5, 7, 11;
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12;
1, 2, 3, 5, 7, 9, 11, 13;
1, 2, 3, 4, 5, 7, 8, 11, 13, 14;
1, 2, 3, 5, 7, 9, 11, 13, 15;
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16;
1, 2, 3, 5, 7, 11, 13, 17;
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18;
1, 2, 3, 5, 7, 9, 11, 13, 17, 19;
		

Links

• Michael De Vlieger, Table of n, a(n) for n = 2..10209 (rows n = 2..180, flattened)

Crossrefs

Cf. A057859 (row lengths), A039701 (row n=3), A039704 (row n=6), A027748, A038566.

Programs

Mathematica

Table[Union[FactorInteger[n][[All, 1]] /. n -> 0, Select[Range[n - 1], CoprimeQ[n, #] &]], {n, 2, 15}] (* Michael De Vlieger, Apr 18 2022 *)

Formula

Row n = A027748(n) U A038566(n), writing n as 0 iff n is prime. - Michael De Vlieger, Apr 18 2022