id:A083579 - OEIS Search Results

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Generalized Jacobsthal numbers.

+0
5

0, 1, 1, 4, 8, 19, 39, 82, 166, 337, 677, 1360, 2724, 5455, 10915, 21838, 43682, 87373, 174753, 349516, 699040, 1398091, 2796191, 5592394, 11184798, 22369609, 44739229, 89478472, 178956956, 357913927, 715827867, 1431655750, 2863311514 (list; graph; listen)

	OFFSET	`0,4`
	FORMULA	`a(n)=22^n/3-5(-1)^n/12-(2n+1)/4 a(n+2)=a(n+1)+2a(n)+n, a(0)=0, a(1)=1`
	CROSSREFS	`Cf. A083580.` `Sequence in context: A049933 A163318 A129362 this_sequence A104626 A065034 A006580` `Adjacent sequences: A083576 A083577 A083578 this_sequence A083580 A083581 A083582`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), May 01 2003`

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Last modified December 17 23:40 EST 2009. Contains 171025 sequences.

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