id:A083423 - OEIS Search Results

Search: id:A083423

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(5*3^n+(-3)^n)/6.

+0
2

1, 2, 9, 18, 81, 162, 729, 1458, 6561, 13122, 59049, 118098, 531441, 1062882, 4782969, 9565938, 43046721, 86093442, 387420489, 774840978, 3486784401, 6973568802, 31381059609, 62762119218, 282429536481, 564859072962 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`G.f.: (1+2x)/((1-3x)(1+3x)). E.g.f.: (5exp(3x)+exp(-3x))/6`
	CROSSREFS	`Cf. A083424.` `Sequence in context: A028881 A083708 A037421 this_sequence A068978 A006226 A109298` `Adjacent sequences: A083420 A083421 A083422 this_sequence A083424 A083425 A083426`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Apr 30 2003`

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Last modified December 19 12:50 EST 2009. Contains 171053 sequences.

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