id:A166039 - OEIS Search Results

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Sums of three consecutive nonprimes A141468.

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5, 11, 18, 23, 27, 31, 36, 41, 45, 49, 54, 59, 63, 67, 71, 75, 78, 81, 85, 90, 95, 99, 102, 105, 109, 113, 117, 121, 126, 131, 135, 139, 143, 147, 150, 153, 157, 161, 165, 168, 171, 175, 180, 185, 189, 192, 195, 199, 203, 207, 211, 216, 221, 225, 228, 231, 235 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`a(1)=0+1+4=5; a(2)=1+4+6=11; a(3)=4+6+8=18.`
	MAPLE	`A002808 := proc(n) option remember; if n = 1 then 4; else for a from procname(n-1)+1 do if not isprime(a) then return a; fi; od: fi; end: A141468 := proc(n) if n <= 2 then n-1 ; else A002808(n-2) ; fi; end: A166039 := proc(n) add(A141468(j), j=n..n+2) ; end: seq(A166039(n), n=1..120) ; [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Oct 10 2009]`
	CROSSREFS	`Cf. A034961, A141468.` `Sequence in context: A075582 A059960 A118122 this_sequence A145005 A004083 A056000` `Adjacent sequences: A166036 A166037 A166038 this_sequence A166040 A166041 A166042`
	KEYWORD	`nonn`
	AUTHOR	`Juri-Stepan Gerasimov (2stepan(AT)rambler.ru), Oct 05 2009`

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Last modified December 8 08:31 EST 2009. Contains 170430 sequences.

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