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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..86.

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: A243613 A194844 A138528 * A194029 A194055 A162192

Adjacent sequences:  A037122 A037123 A037124 * A037126 A037127 A037128

KEYWORD

nonn,easy,tabf

AUTHOR

Vasiliy Danilov (danilovv(AT)usa.net) Jun 15 1998

STATUS

approved

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Last modified April 25 21:06 EDT 2019. Contains 322461 sequences. (Running on oeis4.)