login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A244250 Triangle read by rows in which row n lists the widths in the first octant of the symmetric representation of sigma(n). 3
1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,21

COMMENTS

For the definition of k-th width of the symmetric representation of sigma(n) see A249351.

Row n list the first n terms of the n-th row of A249351.

It appears that the leading diagonal is also A067742 (which was conjectured by Michel Marcus in the entry A237593 and checked with two Mathematica functions up to n = 100000 by Hartmut F. W. Hoft).

For more information see A237591, A237593.

LINKS

Table of n, a(n) for n=1..91.

EXAMPLE

Triangle begins:

1;

1, 1;

1, 1, 0;

1, 1, 1, 1;

1, 1, 1, 0, 0;

1, 1, 1, 1, 1, 2;

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

1, 1, 1, 1, 1, 1, 1, 1;

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

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

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

1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2;

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

...

CROSSREFS

Cf. A000203, A067742, A071562, A196020, A235791, A236104, A237270, A237271, A237591, A237593, A238443, A239660, A239932-A239934, A240542, A241008, A241010, A244360, A244361, A245685, A246955, A246956, A247687, A249223, A249351, A250068, A250070, A250071.

Sequence in context: A309144 A085425 A355685 * A167230 A093658 A096493

Adjacent sequences:  A244247 A244248 A244249 * A244251 A244252 A244253

KEYWORD

nonn,tabl

AUTHOR

Omar E. Pol, Oct 26 2014

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified August 7 23:50 EDT 2022. Contains 355995 sequences. (Running on oeis4.)