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!)
A173869 Irregular table T(n,k) = A164341(n,k) * A036039(n,k) read by rows. 0
1, 2, 2, 6, 6, 4, 24, 24, 18, 24, 10, 120, 120, 120, 120, 90, 80, 26, 720, 720, 720, 480, 720, 720, 300, 480, 540, 300, 76, 5040, 5040, 5040, 5040, 5040, 5040, 3360, 3780, 3360, 5040, 2100, 2100, 2520, 1092, 232, 40320, 40320, 40320, 40320, 25200, 40320 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
The n-th row has A000041(n) columns.
The row sums yield A111883(n) = A000085(n)^2.
A000041 and A000085 are also relevant to the table defined by A104778.
LINKS
EXAMPLE
The row lengths of A164341 and A036039 are the same, so one can multiply
the flattened arrays point-by-point to compute this sequence here:
1..2..2..3..2..4.. A164341 times
1..1..1..2..3..1.. A036039 yields
1..2..2..6..6..4..
CROSSREFS
Sequence in context: A033754 A171661 A276418 * A247377 A167909 A368745
KEYWORD
easy,nonn,tabf
AUTHOR
Alford Arnold, Mar 12 2010
EXTENSIONS
Definition rephrased by R. J. Mathar, Mar 26 2010
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 March 2 05:08 EST 2024. Contains 370460 sequences. (Running on oeis4.)