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A174063 Triangular array (read by rows) containing the least n integers (using lexicographic order) all less than 2n such that no integer divides another. 2
1, 2, 3, 2, 3, 5, 2, 3, 5, 7, 4, 5, 6, 7, 9, 4, 5, 6, 7, 9, 11, 4, 5, 6, 7, 9, 11, 13, 4, 6, 7, 9, 10, 11, 13, 15, 4, 6, 7, 9, 10, 11, 13, 15, 17, 4, 6, 7, 9, 10, 11, 13, 15, 17, 19, 4, 6, 9, 10, 11, 13, 14, 15, 17, 19, 21, 4, 6, 9, 10, 11, 13, 14, 15, 17, 19, 21, 23, 4, 6, 9, 10, 11, 13, 14 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

The first number on each row is 2^k, where k is the greatest integer such that (3^k)/2 < n.

LINKS

Table of n, a(n) for n=1..85.

EXAMPLE

1;

2, 3;

2, 3, 5;

2, 3, 5, 7;

4, 5, 6, 7, 9;

4, 5, 6, 7, 9, 11;

4, 5, 6, 7, 9, 11, 13;

4, 6, 7, 9, 10, 11, 13, 15;

CROSSREFS

Cf. A174062, A174094.

Sequence in context: A249049 A138239 A112484 * A327277 A124459 A283360

Adjacent sequences:  A174060 A174061 A174062 * A174064 A174065 A174066

KEYWORD

nonn,tabl

AUTHOR

David Brown, Mar 07 2010

EXTENSIONS

Definition corrected by David Brown, Mar 20 2010

STATUS

approved

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Last modified February 18 15:30 EST 2020. Contains 332019 sequences. (Running on oeis4.)