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 A161958 a(n) = smallest composite number which is the sum of n consecutive composite numbers. 0
 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; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS EXAMPLE a(7) = 4 + 6 + 8 + 9 + 10 + 12 + 14 = 63. PROG (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] ]; // Klaus Brockhaus, Jun 27 2009 CROSSREFS Cf. A002808 (composite numbers). Sequence in context: A048218 A172484 A009876 * A013921 A028552 A217748 Adjacent sequences:  A161955 A161956 A161957 * A161959 A161960 A161961 KEYWORD nonn AUTHOR Claudio Meller, Jun 22 2009 EXTENSIONS Values through a(51) verified by Klaus Brockhaus, Jun 27 2009 STATUS approved

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Last modified January 23 19:45 EST 2020. Contains 331175 sequences. (Running on oeis4.)