A164019 Table read by rows: row n contains the primes between n and 2n.

3, 5, 5, 7, 7, 7, 11, 11, 13, 11, 13, 11, 13, 17, 11, 13, 17, 19, 13, 17, 19, 13, 17, 19, 23, 17, 19, 23, 17, 19, 23, 17, 19, 23, 29, 17, 19, 23, 29, 31, 19, 23, 29, 31, 19, 23, 29, 31, 23, 29, 31, 37, 23, 29, 31, 37, 23, 29, 31, 37, 41, 23, 29, 31, 37, 41, 43, 29, 31, 37, 41

Offset

2,1

Comments

See A108954 and A060715 for the row lengths.

The row sums are 3, 5, 12, 7, 18, 24, 24, 41, 60, 49, 72, 59, 59,...

Links

Table of n, a(n) for n=2..72.

Example

The table starts at row n=2 as:
3; (between 2 and 4)
5; (between 3 and 6)
5,7; (between 4 and 8)
7; (between 5 and 10)

Crossrefs

Sequence in context: A190136 A360635 A126611 * A307701 A103332 A195796

Adjacent sequences: A164016 A164017 A164018 * A164020 A164021 A164022

Keyword

nonn,easy,tabf

Author

Vincenzo Librandi, Aug 08 2009

Extensions

Redefined as an irregular table - R. J. Mathar, Aug 11 2009

Status

approved