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!)
A128260 A128229 * A051731. 2
1, 2, 1, 3, 2, 1, 4, 1, 3, 1, 5, 4, 0, 4, 1, 6, 1, 1, 0, 5, 1, 7, 6, 6, 0, 0, 6, 1, 8, 1, 0, 1, 0, 0, 7, 1, 9, 8, 1, 8, 0, 0, 0, 8, 1, 10, 1, 9, 0, 1, 0, 0, 0, 9, 1 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row sums = A128261: (1, 3, 6, 9, 14, 14, 26, 18, 35, 31,...)

LINKS

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

EXAMPLE

First few rows of the triangle are:

1;

2, 1;

3, 2, 1;

4, 1, 3, 1;

5, 4, 0, 4, 1;

6, 1, 1, 0, 5, 1;

7, 6, 6, 0, 0, 6, 1;

8, 1, 0, 1, 0, 0, 7, 1;

...

CROSSREFS

Cf. A128229, A051731, A128261, A128259.

Sequence in context: A108371 A138530 A002341 * A083368 A112379 A308780

Adjacent sequences:  A128257 A128258 A128259 * A128261 A128262 A128263

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson, Feb 21 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 August 13 19:30 EDT 2020. Contains 336451 sequences. (Running on oeis4.)