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A327277
Irregular triangle read by rows in which row n lists the first prime(n) primes.
1
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
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
KEYWORD
nonn,tabf
AUTHOR
STATUS
approved