id:A161958 - OEIS Search Results

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A161958

a(n) = smallest composite number which is the sum of n consecutive composite numbers.

+0
1

4, 10, 18, 27, 45, 49, 63, 78, 94, 112, 132, 153, 175, 220, 224, 250, 301, 305, 335, 396, 400, 434, 469, 505, 543, 582, 622, 664, 708, 753, 799, 847, 896, 946, 1045, 1099, 1154, 1158, 1214, 1271, 1329, 1389, 1510, 1514, 1578, 1643, 1773, 1842, 1846, 1916, 1988 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`a(7) = 4 + 6 + 8 + 9 + 10 + 12 + 14 = 63.`
	PROGRAM	`(MAGMA) C:=[ k: k in [4..1000] \| not IsPrime(k) ]; find:=function(n) j:=0; repeat j+:=1; s:=&+[ C[i]: i in [j..n+j-1] ]; until not IsPrime(s); return s; end function; [ find(n): n in [1..51] ]; [From Klaus Brockhaus, Jun 27 2009]`
	CROSSREFS	`Cf. A002808 (composite numbers).` `Sequence in context: A073621 A048218 A009876 this_sequence A013921 A028552 A009877` `Adjacent sequences: A161955 A161956 A161957 this_sequence A161959 A161960 A161961`
	KEYWORD	`nonn`
	AUTHOR	`Claudio L Meller (claudiomeller(AT)gmail.com), Jun 22 2009`
	EXTENSIONS	`Values through a(51) verified by Klaus Brockhaus (klaus-brockhaus(AT)t-online.de), Jun 27 2009`

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Last modified December 11 12:57 EST 2009. Contains 170656 sequences.

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