

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 nth 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 pointbypoint 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



