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A074199
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n!/(1!*2!*3!*...*k!) where k is the largest integer such that 1!*2!*3!*...*k! divides n!.
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3
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1, 1, 3, 2, 10, 60, 420, 140, 1260, 105, 1155, 13860, 180180, 2522520, 37837800, 840840, 14294280, 51051, 969969, 19399380, 407386980, 8962513560, 206137811880, 4947307485120, 123682687128000, 79755701025, 2153403927675
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OFFSET
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1,3
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LINKS
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PROG
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(PARI) a(n)=n!/prod(i=1, if(n<0, 0, s=1; while(n!%prod(i=1, s, i!)==0, s++); s-1), i!)
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CROSSREFS
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KEYWORD
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easy,nonn
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AUTHOR
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STATUS
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approved
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