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

1,1

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!

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

Example

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

Crossrefs

For common differences see A061558.

Sequence in context: A136417 A363672 A322787 * A133277 A133276 A354485

Adjacent sequences: A130788 A130789 A130790 * A130792 A130793 A130794

Keyword

nonn,tabl

Author

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

Extensions

Extended by Ray Chandler, Sep 22 2007

Status

approved