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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A211354 Refined triangle A211358: T(n,k) is the number of partitions up to rotation and reflection of an n-set that are of type k (k-th integer partition, defined by A194602). 1
1, 1, 1, 1, 1, 1, 1, 2, 1, 2, 1, 1, 2, 2, 3, 1, 2, 1, 1, 3, 3, 8, 3, 6, 1, 5, 3, 3, 1, 1, 3, 4, 12, 4, 18, 3, 11, 9, 7, 1, 12, 3, 4, 1, 1, 4, 5, 22, 8, 38, 5, 39, 33, 25, 4, 57, 12, 19, 1, 17, 22, 25, 4, 5, 7, 1, 1, 4, 7, 30, 10, 76, 10, 85, 76, 55 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,8

COMMENTS

The rows are counted from 1, the columns from 0.

Row lengths: 1,2,3,5,7,11... (partition numbers A000041)

Row sums: 1,2,3,7,12,37... (A084708)

Row maxima: 1,1,1,2,3,8,18,57,228,668,3220

Distinct entries per row: 1,1,1,2,3,5,8,14,17,26,30

Rightmost columns are those from the triangle A052307  without the second column.

LINKS

Tilman Piesk, Rows n=1..11 of triangle, flattened

Tilman Piesk, Partition related number triangles

CROSSREFS

Cf. A211358, A000041, A084708, A052307.

Sequence in context: A205107 A228667 A298674 * A211352 A087187 A029380

Adjacent sequences:  A211351 A211352 A211353 * A211355 A211356 A211357

KEYWORD

tabf,nonn

AUTHOR

Tilman Piesk, Apr 09 2012

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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified November 15 11:35 EST 2018. Contains 317238 sequences. (Running on oeis4.)