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A051683
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Triangle read by rows: a(n,k)=n!*k.
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6
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1, 2, 4, 6, 12, 18, 24, 48, 72, 96, 120, 240, 360, 480, 600, 720, 1440, 2160, 2880, 3600, 4320, 5040, 10080, 15120, 20160, 25200, 30240, 35280, 40320, 80640, 120960, 161280, 201600, 241920, 282240, 322560, 362880, 725760, 1088640, 1451520
(list; table; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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COMMENTS
| Numbers with only one non-zero digit when written in base factorial. - Franklin T. Adams-Watters, Nov 28 2011.
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EXAMPLE
| Table begins
1
2 4
6 12 18
24 48 72 96 ...
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MATHEMATICA
| a[n_, k_] := n!*k; Flatten[Table[a[n, k], {n, 9}, {k, n}]] (* From Jean-François Alcover, Apr 22 2011 *)
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CROSSREFS
| Cf. A000142, row sums give A001286(n+1).
Cf. A200748.
Sequence in context: A171923 A060735 A181416 * A181740 A192224 A167777
Adjacent sequences: A051680 A051681 A051682 * A051684 A051685 A051686
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KEYWORD
| easy,nice,nonn,tabl
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AUTHOR
| Klaus Strassburger (strass(AT)ddfi.uni-duesseldorf.de)
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