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 A122040 Numbers which are equal to the arithmetic mean of six successive primes. 3
 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; text; internal format)
 OFFSET 1,1 LINKS 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. MATHEMATICA Select[Table[Sum[Prime[k], {k, n, n + 5}]/6, {n, 100}], IntegerQ] (* Ray Chandler, Sep 25 2006 *) Select[Mean/@Partition[Prime[Range[200]], 6, 1], IntegerQ]  (* Harvey P. Dale, Apr 01 2011 *) CROSSREFS Cf. A122531. Sequence in context: A335859 A259040 A158190 * A342758 A274550 A253235 Adjacent sequences:  A122037 A122038 A122039 * A122041 A122042 A122043 KEYWORD easy,nonn AUTHOR Giovanni Teofilatto, Sep 14 2006 EXTENSIONS Extended by Ray Chandler, Sep 25 2006 STATUS approved

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Last modified September 28 21:22 EDT 2021. Contains 347717 sequences. (Running on oeis4.)