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A138117
Triangle read by rows: row n lists the first 2n-1 prime numbers.
1
2, 2, 3, 5, 2, 3, 5, 7, 11, 2, 3, 5, 7, 11, 13, 17, 2, 3, 5, 7, 11, 13, 17, 19, 23, 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
OFFSET
1,1
EXAMPLE
Triangle begins:
....... 2
..... 2,3,5
... 2,3,5,7,11
. 2,3,5,7,11,13,17
MATHEMATICA
nn=10; Flatten[Table[Take[Prime[Range[2nn+1]], 2n+1], {n, 0, nn}]] (* Harvey P. Dale, Aug 16 2011 *)
CROSSREFS
KEYWORD
easy,nonn,tabf
AUTHOR
Omar E. Pol, Mar 14 2008, corrected Mar 15 2008
STATUS
approved