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A109790 Numbers n such that A083186(n) is prime. 3
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; text; internal format)
OFFSET

1,2

LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..1000

MATHEMATICA

Select[Range[2000], PrimeQ[Sum[Prime[Prime[i]], {i, 1, #}]] &] (* Stefan Steinerberger, Jun 23 2007 *)

Flatten[Position[Accumulate[Prime[Prime[Range[800]]]], _?PrimeQ]] (* Harvey P. Dale, Jun 24 2012 *)

CROSSREFS

Cf. A006450, A083186, A126144.

Sequence in context: A073674 A084722 A083566 * A290426 A211137 A056761

Adjacent sequences:  A109787 A109788 A109789 * A109791 A109792 A109793

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Jun 11 2007

EXTENSIONS

More terms from Stefan Steinerberger, Jun 23 2007

STATUS

approved

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Last modified January 27 18:35 EST 2020. Contains 331296 sequences. (Running on oeis4.)