id:A097341 - OEIS Search Results

Search: id:A097341

Displaying 1-1 of 1 results found.

page 1

Sum k=0..floor(n/2), Stirling2(n-k,k)2^k.

+0
2

1, 0, 2, 2, 6, 14, 38, 110, 342, 1134, 3990, 14830, 58006, 237998, 1021462, 4574318, 21325462, 103287598, 518768406, 2697426926, 14498316182, 80440333998, 460112203798, 2710038058862, 16418576767126, 102212840258094 (list; graph; listen)

	OFFSET	`0,3`
	FORMULA	`a(n)=sum{k=0..floor(n/2), sum{i=0..k, (-1)^(k+i)i^(n-k)/(i!(k-i)!)}2^k }`
	CROSSREFS	`Cf. A024427, A097342.` `Sequence in context: A071109 A005310 A002203 this_sequence A142710 A014431 A142471` `Adjacent sequences: A097338 A097339 A097340 this_sequence A097342 A097343 A097344`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Aug 05 2004`

page 1

Search completed in 0.002 seconds

Last modified December 11 12:57 EST 2009. Contains 170656 sequences.

AT&T Labs Research