id:A078820 - OEIS Search Results

Search: id:A078820

Displaying 1-1 of 1 results found.

page 1

20*C(2n,n)*(2n+1)/(n+4).

+0
3

5, 24, 100, 400, 1575, 6160, 24024, 93600, 364650, 1421200, 5542680, 21633248, 84504875, 330372000, 1292646000, 5061729600, 19835652870, 77786874000, 305254551000, 1198665468000, 4709756401350, 18516070880736 (list; graph; listen)

	OFFSET	`0,1`
	FORMULA	`a(n) =a(n-1)(4n^2+14n+6)/(n^2+4n) =A078817(3, n) =(2n+1)A078819(n)/7 =20*A002457(n)/(n+4).`
	EXAMPLE	`a(5)=20C(10,5)11/9=6160.`
	CROSSREFS	`Cf. A001700, A001791, A007946.` `Sequence in context: A066316 A087095 A099653 this_sequence A046724 A008464 A063001` `Adjacent sequences: A078817 A078818 A078819 this_sequence A078821 A078822 A078823`
	KEYWORD	`nonn`
	AUTHOR	`Henry Bottomley (se16(AT)btinternet.com), Dec 07 2002`

page 1

Search completed in 0.002 seconds

Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

AT&T Labs Research