id:A054454 - OEIS Search Results

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Third column of triangle A054453.

+0
3

1, 2, 6, 12, 26, 50, 97, 180, 332, 600, 1076, 1908, 3361, 5878, 10226, 17700, 30510, 52390, 89665, 153000, 260376, 442032, 748776, 1265832, 2136001, 3598250, 6052062, 10164540, 17048642 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`a(n)= A054453(n+2, 2). a(2k)= 1+(8nF(2n+1)+3(2n+1)F(2n))/5, a(2k+1)=2(2(2n+1)F(2(n+1))+3(n+1)F(2*n+1))/5.` `G.f.: ((Fib(x))^2)/(1-x^2), with Fib(x)=1/(1-x-x^2) = g.f. A000045(n+1)(Fibonacci numbers without F(0)).`
	CROSSREFS	`Cf. A054453, A000045.` `Sequence in context: A034875 A136515 A141347 this_sequence A084170 A052971 A029863` `Adjacent sequences: A054451 A054452 A054453 this_sequence A054455 A054456 A054457`
	KEYWORD	`easy,nonn`
	AUTHOR	`Wolfdieter Lang (wolfdieter.lang(AT)physik.uni-karlsruhe.de), Apr 27 2000`

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.

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