A083860 - OEIS

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A083860

First sub-diagonal of generalized Fibonacci array A083856.

0, 1, 1, 5, 11, 55, 176, 937, 3781, 21571, 102455, 624493, 3356640, 21752431, 129055681, 884773585, 5696734715, 41129090011, 283908657880, 2149818248341, 15765656131765, 124759995175751, 965186517474191, 7956847444317049 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,4`
	FORMULA	`a(n)=(((1+sqrt(4n+5))/2)^n-((1-sqrt(4n+5))/2)^n)/sqrt(4n+5).` `a(n) = A193376(n-1,n+1). - R. J. Mathar, Aug 23 2011`
	CROSSREFS	`Cf. A083859.` `Sequence in context: A149529 A149530 A149531 * A141496 A192428 A060358` `Adjacent sequences: A083857 A083858 A083859 * A083861 A083862 A083863`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), May 06 2003`

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Last modified February 16 14:07 EST 2012. Contains 205930 sequences.