

A130791


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


5



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
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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: A192928 A136417 A322787 * A133277 A133276 A055501
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



