id:A100455 - OEIS Search Results

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a(n) = 2^n + sin(n*Pi/2).

+0
1

1, 3, 4, 7, 16, 33, 64, 127, 256, 513, 1024, 2047, 4096, 8193, 16384, 32767, 65536, 131073, 262144, 524287, 1048576, 2097153, 4194304, 8388607, 16777216, 33554433, 67108864, 134217727, 268435456, 536870913, 1073741824, 2147483647, 4294967296, 8589934593 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`The sequence represents a noised binary mask.`
	EXAMPLE	`a(3) = 7 because 2^3 + sin(3*pi/2) = 8 - 1 = 7`
	CROSSREFS	`Adjacent sequences: A100452 A100453 A100454 this_sequence A100456 A100457 A100458` `Sequence in context: A027020 A130755 A116090 this_sequence A078825 A093611 A042375`
	KEYWORD	`nonn`
	AUTHOR	`Konstantin Loutski (kilout(AT)yandex.ru), Nov 22 2004`

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Last modified October 7 08:31 EDT 2008. Contains 144667 sequences.

AT&T Labs Research