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A056819 Product_{k|n} (n+1-k). 1
1, 2, 3, 12, 5, 120, 7, 280, 63, 540, 11, 83160, 13, 1456, 2145, 28080, 17, 636480, 19, 1136960, 5985, 5544, 23, 1070845776, 525, 9100, 12825, 6237000, 29, 5320224000, 31, 12226400, 23529, 20196, 31465, 582876756000, 37, 28120, 38961, 44639955360 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

EXAMPLE

a(6) = (6+1-1) *(6+1-2) *(6+1-3) *(6+1-6) = 6 *5 *4 *1 = 120, since the positive divisors of 6 are 1, 2, 3, 6.

CROSSREFS

Sequence in context: A062957 A124444 A038610 * A124442 A088611 A137765

Adjacent sequences:  A056816 A056817 A056818 * A056820 A056821 A056822

KEYWORD

nonn

AUTHOR

Leroy Quet Sep 01 2000

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Last modified February 14 00:26 EST 2012. Contains 205567 sequences.