A173869 Irregular table T(n,k) = A164341(n,k) * A036039(n,k) read by rows.

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

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 A368745

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