id:A128054 - OEIS Search Results

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Count, omitting numbers of the form 6k+4, and doubling multiples of 6.

+0
3

0, 0, 1, 2, 3, 5, 6, 6, 7, 8, 9, 11, 12, 12, 13, 14, 15, 17, 18, 18, 19, 20, 21, 23, 24, 24, 25, 26, 27, 29, 30, 30, 31, 32, 33, 35, 36, 36, 37, 38, 39, 41, 42, 42, 43, 44, 45, 47, 48, 48, 49, 50, 51, 53, 54, 54, 55, 56, 57, 59, 60, 60, 61, 62, 63, 65, 66, 66 (list; graph; listen)

	OFFSET	`0,4`
	FORMULA	`a(n)=cos(2pin/3)/6-sqrt(3)sin(2pin/3)/6+cos(pin/3)/2-sqrt(3)sin(pin/3)/6+(3n-2)/3`
	CROSSREFS	`Sequence in context: A072636 A001600 A000036 this_sequence A023834 A084735 A002734` `Adjacent sequences: A128051 A128052 A128053 this_sequence A128055 A128056 A128057`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Feb 13 2007`

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.

AT&T Labs Research