A109790 Numbers k such that A083186(k) is prime.

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

Offset

1,2

Links

Amiram Eldar, Table of n, a(n) for n = 1..10000 (terms 1..1000 from Harvey P. Dale)

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