A327277 Irregular triangle read by rows in which row n lists the first prime(n) primes.

2, 3, 2, 3, 5, 2, 3, 5, 7, 11, 2, 3, 5, 7, 11, 13, 17, 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67

Offset: 1

Author

Frederick John Bernet III, Sep 15 2019

Keywords

• nonn
• tabf

Examples

			Table begins:
  2, 3;
  2, 3, 5;
  2, 3, 5, 7, 11;
  2, 3, 5, 7, 11, 13, 17;
  2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31;
  2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41;
  ...
		

Links

• Harvey P. Dale, Table of n, a(n) for n = 1..1000

Crossrefs

Right border gives A006450.

A138117 is essentially the same triangle.

Programs

Mathematica

m = 8; p = Array[Prime, Prime[m]]; Join @@ (p[[1 ;; p[[#]]]] & /@ Range[m]) (* Amiram Eldar, Sep 24 2019 *)
Table[Take[Prime[Range[Prime[n]]],n],{n,Prime[Range[10]]}]//Flatten (* Harvey P. Dale, Oct 30 2021 *)