id:A137462 - OEIS Search Results

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a(n)+a(n-1) = n-th semiprime.

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	OFFSET	`0,2`
	COMMENT	`This is to A001358 as A036467 is to A000040.`
	FORMULA	`a(n)+a(n-1) = A001358(n).`
	MAPLE	`A001358 := proc(n) option remember ; if n =1 then 4; else for a from A001358(n-1)+1 do if numtheory[bigomega](a) = 2 then RETURN(a) ; fi ; od: fi ; end: A137462 := proc(n) option remember; if n =0 then 1; else A001358(n)-A137462(n-1) ; fi ; end: seq(A137462(n), n=0..100) ; - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Apr 23 2008`
	CROSSREFS	`Cf. A001358, A036467, A065516.` `Sequence in context: A135986 A069734 A070952 this_sequence A050346 A142149 A132119` `Adjacent sequences: A137459 A137460 A137461 this_sequence A137463 A137464 A137465`
	KEYWORD	`easy,nonn`
	AUTHOR	`Jonathan Vos Post (jvospost3(AT)gmail.com), Apr 19 2008`
	EXTENSIONS	`More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Apr 23 2008`

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Last modified December 3 01:16 EST 2008. Contains 151161 sequences.

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