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A122040
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Numbers which are equal to the arithmetic mean of six successive primes.
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3
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12, 15, 22, 26, 30, 34, 38, 42, 55, 64, 77, 82, 87, 92, 101, 105, 110, 115, 126, 139, 144, 160, 165, 170, 190, 227, 232, 274, 279, 292, 298, 304, 312, 326, 339, 346, 352, 358, 369, 375, 387, 393, 406, 413, 419, 431, 436, 442, 447, 452, 469, 481, 516, 524, 533
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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EXAMPLE
| a(1) = 12 because (5+7+11+13+17+19)/6 = 12;
a(2) = 15 because (7+11+13+17+19+23)/6 = 15.
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MATHEMATICA
| Select[Table[Sum[Prime[k], {k, n, n + 5}]/6, {n, 100}], IntegerQ] (*Chandler*)
Select[Mean/@Partition[Prime[Range[200]], 6, 1], IntegerQ] (* From Harvey P. Dale, Apr 1 2011 *)
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CROSSREFS
| Cf. A122531.
Sequence in context: A162826 A162820 A158190 * A050480 A063604 A015904
Adjacent sequences: A122037 A122038 A122039 * A122041 A122042 A122043
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KEYWORD
| easy,nonn
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AUTHOR
| Giovanni Teofilatto (g.teofilatto(AT)tiscalinet.it), Sep 14 2006
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EXTENSIONS
| Extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), Sep 25 2006
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