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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
OFFSET
1,2
COMMENTS
The row sum of row n is A001286(n).
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
KEYWORD
easy,nonn,tabf
AUTHOR
Alford Arnold, Oct 17 2010
STATUS
approved