A181416 Irregular table T(n,k) = n*A178883(n,k) read by rows.

1, 2, 4, 6, 12, 18, 24, 32, 16, 72, 96, 120, 120, 120, 180, 180, 480, 600, 720, 576, 576, 288, 648, 1296, 216, 1152, 1728, 3600, 4320, 5040, 3360, 3360, 3360, 3024, 6048, 3024, 3024, 4032, 12096, 4032, 8400, 16800, 30240, 35280, 40320

Offset

1,2

Comments

The row sum of row n is A001286(n).

Links

Table of n, a(n) for n=1..45.

Formula

T(n,k) = A036042(n,k)*A178883(n,k), 1<=k<= A000041(n).

Example

In row n=3 the products are (3,3,3) times (2,4,6) yielding (6,12,18) which adds to 36, the third Lah number.
The table starts in row n=1 with row lengths A000041(n) as:
1;
2,4;
6,12,18;
24,32,16,72,96;
120,120,120,180,180,480,600;

Crossrefs

Cf. A051683.

Sequence in context: A342702 A171923 A060735 * A225566 A273009 A051683

Adjacent sequences: A181413 A181414 A181415 * A181417 A181418 A181419

Keyword

easy,nonn,tabf

Author

Alford Arnold, Oct 17 2010

Status

approved