id:A122038 - OEIS Search Results

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A122038

a(n) = 1*3^(3*n)+2*3^(2*n)-3*3^(1*n).

+0
1

36, 864, 21060, 544320, 14466276, 388481184, 10469912580, 282515610240, 7626372266916, 205898105486304, 5559123328143300, 150095200154477760, 4052560236745849956, 109419034885082920224, 2954313118333054841220 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`From a quiz.`
	LINKS	`C. P. Simoes, Teste de Desempenho Mental.`
	FORMULA	`a(n) = 3^(3n)+23^(2n)-3^(n+1) = (3^(n-1) + 1)(3^n-1)*3^(n+1)`
	PROGRAM	`(PARI) for(n=1, 20, print1(3^(3n)+23^(2*n)-3^(n+1), ", "))`
	CROSSREFS	`Sequence in context: A004360 A081142 A061694 this_sequence A001812 A075916 A062150` `Adjacent sequences: A122035 A122036 A122037 this_sequence A122039 A122040 A122041`
	KEYWORD	`nonn`
	AUTHOR	`Herman Jamke (hermanjamke(AT)fastmail.fm), Sep 14 2006`

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

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