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1, 1, 2, 2, 6, 12, 6, 24, 48, 24, 72, 24, 120, 240, 240, 360, 360, 480, 120, 720, 1440, 1440, 720, 2160, 4320, 720, 2880, 4320, 3600, 720, 5040, 10080, 10080, 10080, 15120, 30240, 15120, 15120, 20160, 60480, 20160, 25200, 50400, 30240, 5040, 40320, 80640, 80640, 80640, 40320, 120960
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,3
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LINKS
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FORMULA
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EXAMPLE
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A048996 begins 1,1,1,1,1,2,1, 1, 2, 1, 3, 1 ...
A178801 begins 1,1,2,2,6,6,6,24,24,24,24,24,...
therefore
a(n) begins 1,1,2,2,6,12,6,...
with row sums 1, 1, 4, 24, 192, 1920, 23040, ... .
Triangle begins:
1;
1;
2, 2;
6, 12, 6;
24, 48, 24, 72, 24;
120, 240, 240, 360, 360, 480, 120;
720, 1440, 1440, 720, 2160, 4320, 720, 2880, 4320, 3600, 720;
...
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CROSSREFS
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KEYWORD
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easy,nonn,tabf
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AUTHOR
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STATUS
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approved
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