login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A127372 Triangle read by rows: A127170 * A054521 as infinite lower triangular matrices. 0
1, 3, 0, 3, 1, 0, 6, 0, 1, 0, 3, 1, 1, 1, 0, 9, 2, 0, 0, 1, 0, 3, 1, 1, 1, 1, 1, 0, 10, 0, 3, 0, 1, 0, 1, 0, 6, 3, 0, 1, 1, 0, 1, 1, 0, 9, 2, 3, 2, 0, 0, 1, 0, 1, 0 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Left column = A007425, (tau_3(n)): 1, 3, 3, 6, 3, 9... Row sums = sigma(n), A000203: 1, 3, 4, 7, 6, 12,...

LINKS

Table of n, a(n) for n=1..55.

EXAMPLE

First few rows of the triangle are:

1;

3, 0;

3, 1, 0;

6, 0, 1, 0;

3, 1, 1, 1, 0;

9, 2, 0, 0, 1, 0;

3, 1, 1, 1, 1, 1, 0;

10, 0, 3, 0, 1, 0, 1, 0;

...

CROSSREFS

Cf. A127170, A054521, A000203, A007425.

Sequence in context: A138123 A328382 A211868 * A051171 A300904 A307807

Adjacent sequences:  A127369 A127370 A127371 * A127373 A127374 A127375

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson, Jan 12 2007

EXTENSIONS

Edited by N. J. A. Sloane, Jul 11 2008

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 26 18:08 EDT 2020. Contains 334630 sequences. (Running on oeis4.)