

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
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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



