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A130493 Triangle read by rows in which row n contains n! repeated n times. 3
1, 2, 2, 6, 6, 6, 24, 24, 24, 24, 120, 120, 120, 120, 120, 720, 720, 720, 720, 720, 720, 5040, 5040, 5040, 5040, 5040, 5040, 5040 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row sums = A001563: (1, 4, 18, 96, 600, 4320,...). A130477(n,k) * A130478(n,k) = A130493(n,k). Example: take dot products of rows with equal numbers of terms in A130477 and A130478, (1, 3, 8, 12) dot (24, 8, 3, 2) = (24, 24, 24, 24).

LINKS

Table of n, a(n) for n=1..28.

FORMULA

Triangle, n! repeated n times per row.

EXAMPLE

First few rows of the triangle are:

1;

2, 2;

6, 6, 6;

24, 24, 24, 24;

...

MATHEMATICA

Flatten[Table[Table[n!, {n}], {n, 10}]] (* Harvey P. Dale, Dec 24 2014 *)

CROSSREFS

Cf. A001563, A130477, A130478.

Sequence in context: A033742 A048594 A178801 * A267516 A163118 A319010

Adjacent sequences:  A130490 A130491 A130492 * A130494 A130495 A130496

KEYWORD

nonn,tabl

AUTHOR

Gary W. Adamson, May 31 2007

STATUS

approved

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Last modified June 22 14:14 EDT 2021. Contains 345380 sequences. (Running on oeis4.)