A153478 Sum of first n isolated (or single) primes A007510.

2, 25, 62, 109, 162, 229, 308, 391, 480, 577, 690, 817, 948, 1105, 1268, 1435, 1608, 1819, 2042, 2275, 2526, 2783, 3046, 3323, 3616, 3923, 4240, 4571, 4908, 5261, 5620, 5987, 6360, 6739, 7122, 7511, 7908, 8309, 8718, 9157, 9600

Offset

1,1

Links

G. C. Greubel, Table of n, a(n) for n = 1..1000

Omar E. Pol, Determinacion geometrica de los numeros primos y perfectos

Mathematica

Accumulate[Select[Prime[Range[100]], !PrimeQ[#-2]&&!PrimeQ[#+2]&]]  (* Harvey P. Dale, Feb 08 2011 *)

Crossrefs

Cf. A000040, A007504, A007510, A048598, A071148, A153474.

Sequence in context: A369670 A038834 A041071 * A226491 A062933 A348064

Adjacent sequences: A153475 A153476 A153477 * A153479 A153480 A153481

Keyword

easy,nonn

Author

Omar E. Pol, Dec 27 2008

Status

approved