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A113460 Triangle read by rows: n-th row is the lexicographically earliest arithmetic progression of n numbers all having the same prime signature. 5
1, 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 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Presumably this triangle will differ from that in A130791 after some point. - N. J. A. Sloane, Sep 22 2007

Apart from the initial term, this sequence coincides with A130791 for at least the first 210 rows. - David W. Wilson, Sep 22 2007

LINKS

Table of n, a(n) for n=1..43.

Index entries for sequences related to primes in arithmetic progressions

EXAMPLE

Triangle begins:

1

2,3

3,5,7

5,11,17,23

5,11,17,23,29

7,37,67,97,127,157

CROSSREFS

Cf. A113459 (leading terms).

Cf. A007918, A086786, A113459, A113461, A130791, A127781.

Sequence in context: A180611 A084127 A089934 * A113470 A086786 A211890

Adjacent sequences:  A113457 A113458 A113459 * A113461 A113462 A113463

KEYWORD

nonn,tabl

AUTHOR

David Wasserman, Jan 08 2006

EXTENSIONS

Erroneous commas in sequence deleted by N. J. A. Sloane, Sep 22 2007

STATUS

approved

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Last modified January 18 03:13 EST 2019. Contains 319260 sequences. (Running on oeis4.)