login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A131304 2*A089840 - A000012. 1
1, 3, 1, 5, 5, 1, 7, 3, 3, 1, 9, 13, 5, 3, 1, 11, 15, 7, 5, 3, 1, 13, 11, 11, 9, 5, 3, 1, 15, 7, 9, 7, 9, 5, 3, 1, 17, 9, 13, 11, 11, 11, 5, 3, 1, 19, 33, 15, 137, 9, 11, 5, 3, 1 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..54.

FORMULA

2*A089840(deleting the right border of zeros) - A000012

EXAMPLE

First few rows of the triangle are:

1;

3, 1;

5, 5, 1;

7, 3, 3, 1;

9, 13, 5, 3, 1;

11, 15, 7, 5, 3, 1;

13, 11, 11 9, 5, 3, 1;

...

CROSSREFS

Cf. A089840, A131302, A131303, A122203, A122204.

Sequence in context: A228785 A135184 A210224 * A131302 A131305 A131303

Adjacent sequences:  A131301 A131302 A131303 * A131305 A131306 A131307

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson, Jun 27 2007

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 July 18 07:10 EDT 2019. Contains 325134 sequences. (Running on oeis4.)