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A181416 Irregular table T(n,k) = n*A178883(n,k) read by rows. 0
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 (list; graph; refs; listen; history; text; internal format)
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: A175305 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

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Last modified June 24 21:16 EDT 2019. Contains 324337 sequences. (Running on oeis4.)