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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A318287 Number of non-isomorphic strict multiset partitions of a multiset whose multiplicities are the prime indices of n. 7
1, 1, 1, 2, 2, 3, 2, 3, 4, 5, 3, 7, 4, 7, 9, 5, 5, 12, 6, 12, 14, 10, 8, 13, 12, 14, 14, 18, 10, 34 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

LINKS

Table of n, a(n) for n=1..30.

FORMULA

a(n) = A318357(A181821(n)).

EXAMPLE

Non-isomorphic representatives of the a(20) = 12 strict multiset partitions of {1,1,1,2,3}:

  {{1,1,1,2,3}}

  {{1},{1,1,2,3}}

  {{2},{1,1,1,3}}

  {{1,1},{1,2,3}}

  {{1,2},{1,1,3}}

  {{2,3},{1,1,1}}

  {{1},{2},{1,1,3}}

  {{1},{1,1},{2,3}}

  {{1},{1,2},{1,3}}

  {{2},{3},{1,1,1}}

  {{2},{1,1},{1,3}}

  {{1},{2},{3},{1,1}}

CROSSREFS

Cf. A001055, A007716, A045778, A181821, A305936, A316980, A317533, A317776, A317791.

Cf. A318283, A318284, A318285, A318286, A318357, A318362, A318371.

Sequence in context: A286535 A324344 A059711 * A048621 A319611 A239495

Adjacent sequences:  A318284 A318285 A318286 * A318288 A318289 A318290

KEYWORD

nonn,more

AUTHOR

Gus Wiseman, Aug 23 2018

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 April 26 12:07 EDT 2019. Contains 322472 sequences. (Running on oeis4.)