A130791 Triangle read by rows: n-th row is the lexicographically earliest arithmetic progression of n primes beginning with A007918(n).

2, 2, 3, 3, 5, 7, 5, 11, 17, 23, 5, 11, 17, 23, 29, 7, 37, 67, 97, 127, 157, 7, 157, 307, 457, 607, 757, 907, 11, 1210241, 2420471, 3630701, 4840931, 6051161, 7261391, 8471621, 11, 32671181, 65342351, 98013521, 130684691, 163355861, 196027031, 228698201, 261369371

Offset: 1

Author

N. J. A. Sloane, Sep 22 2007, Oct 17 2007

Keywords

• nonn
• tabl

Comments

If we omit the first row, is this the same triangle as A113460? Equivalently, do A061558 and A113461 agree apart from the initial term? Answer: almost certainly not!

Examples

			Triangle begins:
2
2 3
3 5 7
5 11 17 23
5 11 17 23 29
7 37 67 97 127 157
7 157 307 457 607 757 907
11 1210241 2420471 3630701 4840931 6051161 7261391 8471621
11 32671181 65342351 98013521 130684691 163355861 196027031 228698201 261369371
		

Links

• Ray Chandler, Table of n, a(n) for n=1..153
• Andrew Granville, Prime Number Patterns
• Index entries for sequences related to primes in arithmetic progressions

Crossrefs

For common differences see A061558.

Extensions

Extended by Ray Chandler, Sep 22 2007