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A037125
Irregular triangle: row n is 1, 2, 3, 4, .., prime(n).
0
1, 2, 1, 2, 3, 1, 2, 3, 4, 5, 1, 2, 3, 4, 5, 6, 7, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 1, 2, 3, 4, 5, 6, 7, 8, 9
OFFSET
1,2
EXAMPLE
From Omar E. Pol, May 29 2012: (Start)
Written as an irregular triangle the sequence begins:
1, 2;
1, 2, 3;
1, 2, 3, 4, 5;
1, 2, 3, 4, 5, 6, 7;
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11;
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13;
Row n has length A000040(n). (End)
MATHEMATICA
Flatten@Range@Prime@Range[9] (* Arkadiusz Wesolowski, Jul 02 2012 *)
CROSSREFS
Cf. A002260.
Sequence in context: A194844 A138528 A364604 * A194029 A194055 A162192
KEYWORD
nonn,easy,tabf
AUTHOR
Vasiliy Danilov (danilovv(AT)usa.net), Jun 15 1998
STATUS
approved