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Search: id:A130493
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| A130493 |
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Triangle read by rows in which row n contains n! repeated n times. |
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+0
2
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| 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; listen)
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OFFSET
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1,2
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COMMENT
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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).
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FORMULA
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Triangle, n! repeated n times per row.
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EXAMPLE
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First few rows of the triangle are:
1;
2, 2;
6, 6, 6;
24, 24, 24, 24;
...
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CROSSREFS
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Cf. A001563, A130477, A130478.
Sequence in context: A122766 A033742 A048594 this_sequence A163118 A010762 A055993
Adjacent sequences: A130490 A130491 A130492 this_sequence A130494 A130495 A130496
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KEYWORD
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nonn,tabl
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AUTHOR
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Gary W. Adamson (qntmpkt(AT)yahoo.com), May 31 2007
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