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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

Table of n, a(n) for n=1..50.

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

Cf. A000041, A000085, A036039, A104778, A111883, A164341.

Sequence in context: A033754 A171661 A276418 * A247377 A167909 A185421

Adjacent sequences:  A173866 A173867 A173868 * A173870 A173871 A173872

KEYWORD

easy,nonn,tabf

AUTHOR

Alford Arnold, Mar 12 2010

EXTENSIONS

Definition rephrased by R. J. Mathar, Mar 26 2010

STATUS

approved

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Last modified April 23 09:30 EDT 2021. Contains 343204 sequences. (Running on oeis4.)