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!)
A327482 Irregular triangle read by rows where T(n,d) is the number of integer partitions of n with mean d|n. 5
1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 3, 3, 1, 1, 1, 1, 5, 4, 1, 1, 7, 1, 1, 7, 5, 1, 1, 1, 1, 11, 15, 12, 6, 1, 1, 1, 1, 15, 7, 1, 1, 30, 19, 1, 1, 22, 34, 8, 1, 1, 1, 1, 30, 58, 27, 9, 1, 1, 1, 1, 42, 84, 64, 10, 1, 1, 105, 37, 1, 1, 56, 11, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,7

LINKS

Table of n, a(n) for n=1..74.

EXAMPLE

Triangle begins:

  1

  1  1

  1  1

  1  2  1

  1  1

  1  3  3  1

  1  1

  1  5  4  1

  1  7  1

  1  7  5  1

  1  1

  1 11 15 12  6  1

  1  1

  1 15  7  1

  1 30 19  1

  1 22 34  8  1

MATHEMATICA

Table[Length[Select[IntegerPartitions[n], Mean[#]==d&]], {n, 20}, {d, Divisors[n]}]

CROSSREFS

Row sums are A067538.

The version for subsets is A327481.

Cf. A066571, A237984, A240850, A327474, A327483, A327484.

Sequence in context: A181386 A193517 A296554 * A189006 A245013 A219924

Adjacent sequences:  A327479 A327480 A327481 * A327483 A327484 A327485

KEYWORD

nonn,tabf

AUTHOR

Gus Wiseman, Sep 13 2019

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 14 16:23 EDT 2021. Contains 343884 sequences. (Running on oeis4.)