id:A098405 - OEIS Search Results

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Expansion of (1-sqrt(1-8x))/((1-x)(4x*sqrt(1-8x)).

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1, 7, 47, 327, 2343, 17127, 126951, 950631, 7173991, 54471527, 415652711, 3184708455, 24485137255, 188802730855, 1459525454695, 11307626564455, 87775235181415, 682523302202215, 5315297718995815, 41450938169985895 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`Partial sums of A069720.`
	FORMULA	`a(n)=sum{k=0..n, Binomial(2k+1, k)2^k}`
	CROSSREFS	`Adjacent sequences: A098402 A098403 A098404 this_sequence A098406 A098407 A098408` `Sequence in context: A085352 A125370 A126528 this_sequence A104092 A024187 A001711`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Sep 06 2004`

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Last modified October 7 14:39 EDT 2008. Contains 144666 sequences.

AT&T Labs Research