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

1,1

Links

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

Example

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;
  ...

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 *)

Crossrefs

Right border gives A006450.

A138117 is essentially the same triangle.

Sequence in context: A361330 A112484 A174063 * A124459 A283360 A256366

Adjacent sequences: A327274 A327275 A327276 * A327278 A327279 A327280

Keyword

nonn,tabf

Author

Frederick John Bernet III, Sep 15 2019

Status

approved