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A109790
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Numbers n such that A083186(n) is prime.
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2
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1, 3, 5, 7, 9, 15, 19, 33, 47, 49, 51, 55, 63, 73, 97, 105, 117, 119, 131, 165, 189, 195, 223, 229, 243, 245, 253, 257, 263, 273, 277, 291, 295, 297, 329, 331, 357, 367, 371, 389, 391, 395, 397, 399, 445, 487, 497, 551, 577, 603, 605, 637, 641, 643, 683, 685
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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MATHEMATICA
| Select[Range[2000], PrimeQ[Sum[Prime[Prime[i]], {i, 1, #}]] &] - Stefan Steinerberger (stefan.steinerberger(AT)gmail.com), Jun 23 2007
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CROSSREFS
| Cf. A006450, A083186, A126144.
Sequence in context: A073674 A084722 A083566 * A056761 A108347 A135553
Adjacent sequences: A109787 A109788 A109789 * A109791 A109792 A109793
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Jun 11 2007
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EXTENSIONS
| More terms from Stefan Steinerberger (stefan.steinerberger(AT)gmail.com), Jun 23 2007
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