id:A014454 - OEIS Search Results

Search: id:A014454

Displaying 1-1 of 1 results found.

page 1

Sum{gcd(k!, n!/k! | 1<=k<n}.

+0
1

0, 1, 2, 5, 6, 21, 22, 73, 210, 1693, 1694, 2097, 2098, 12997, 21468, 174169, 174170, 1986237, 1986238, 10178833, 16875654, 246551437, 246551438, 2032266537, 3767596738, 45445808989, 260705796192 (list; graph; listen)

	OFFSET	`1,3`
	EXAMPLE	`a(5)=gcd(1!,5!)+gcd(2!,345)+gcd(3!,4*5)+gcd(4!,5)=1+2+2+1=6.`
	CROSSREFS	`Cf. A000142.` `Sequence in context: A098871 A146477 A166753 this_sequence A136324 A128367 A137067` `Adjacent sequences: A014451 A014452 A014453 this_sequence A014455 A014456 A014457`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Feb 12 2002`

page 1

Search completed in 0.002 seconds

Last modified December 10 00:48 EST 2009. Contains 170565 sequences.

AT&T Labs Research