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Search: id:A165239
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| A165239 |
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Integers of pseudo-averages of at least two consecutive nonprime numbers of the form (a+b+c+..+z)/z, start from 1. |
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+0
2
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OFFSET
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1,1
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EXAMPLE
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(1 + 4 + 6 + 8 + 9 + 10 + 12 + 14 + 15 + 16 + 18 + 20 + 21 + 22)/22=8,
(1 + 4 + 6 + 8 + 9 + 10 + 12 + 14 + 15 + 16 + 18 + 20 + 21 + 22 + 24 + 25)/25=9
(1 + 4 + 6 + 8 + 9 + 10 + 12 + 14 + 15 + 16 + 18 + 20 + 21 + 22 + 24 + 25 + 26 + 27 + 28 + 30 + 32 + 33 + 34 + 35 + 36 + 38 + 39 + 40 + 42 + 44 + 45 + 46 + 48 + 49 + 50 + 51 + 52 + 54 + 55 + 56 + 57 + 58 + 60 + 62 + 63 + 64 + 65 + 66 + 68 + 69 + 70 + 72 + 74 + 75 + 76 + 77 + 78 + 80 + 81 + 82 + 84 + 85 + 86 + 87 + 88 + 90 + 91 + 92 + 93 + 94 + 95 + 96 + 98 + 99 + 100 + 102 + 104 + 105 + 106 + 108 + 110 + 111 + 112 + 114 + 115 + 116 + 117 + 118)/118=46
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MATHEMATICA
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lst={}; a=0; Do[If[ !PrimeQ[n], m=n; a+=m; If[IntegerQ[a/n]&&a!=n, AppendTo[lst, a/n]]], {n, 5*9!}]; lst
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CROSSREFS
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Cf. A163862
Sequence in context: A041138 A048068 A037957 this_sequence A103315 A042847 A121330
Adjacent sequences: A165236 A165237 A165238 this_sequence A165240 A165241 A165242
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KEYWORD
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nonn,uned
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AUTHOR
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Vladimir Orlovsky (4vladimir(AT)gmail.com), Sep 09 2009
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