

A134841


Triangle read by rows: first n terms of nth row of an array formed by A126988 * A053731(transform).


1



1, 2, 3, 3, 3, 4, 4, 6, 4, 7, 5, 5, 5, 5, 6, 6, 9, 8, 9, 6, 12, 7, 7, 7, 7, 7, 7, 8, 8, 12, 8, 14, 8, 12, 8, 15, 9, 9, 12, 9, 9, 12, 9, 9, 13, 10, 15, 10, 15, 12, 15, 10, 15, 10, 18
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OFFSET

0,2


COMMENTS

Right border = sigma(n), A000203: (1, 3, 4, 7, 6, 12,...). Row sums = A001157: (1, 5, 10, 21, 26, 50, 50,...).


LINKS

Table of n, a(n) for n=0..54.


EXAMPLE

First few terms of the array are:
1, 1, 1, 1, 1, 1, 1,...
2, 3, 2, 3, 2, 3, 2,...
3, 3, 4, 3, 3, 4, 3,...
4, 6, 4, 7, 4, 6, 4,...
5, 5, 5, 5, 5, 6, 5,...
6, 9, 8, 9, 6, 12,6,...
7, 7, 7, 7, 7, 7, 8,...
...
First few rows of the triangle are:
1;
2, 3;
3, 3, 4;
4, 6, 4, 7;
5, 5, 5, 5, 6;
6, 9, 8, 9, 6, 12;
7, 7, 7, 7, 7, 7, 8,
...


CROSSREFS

Cf. A051731, A126988, A001157, A000203.
Sequence in context: A156250 A029108 A181550 * A071112 A097087 A153161
Adjacent sequences: A134838 A134839 A134840 * A134842 A134843 A134844


KEYWORD

nonn,tabl


AUTHOR

Gary W. Adamson, Nov 12 2007


STATUS

approved



