A038708 Primes of the form (k-th primorial) + (k+1)-st prime.

5, 11, 37, 30047, 510529, 9699713, 13082761331670077, 32589158477190044789, 1922760350154212639131, 40729680599249024150621323549

Offset

1,1

Links

Jinyuan Wang, Table of n, a(n) for n = 1..11

Example

k=6: 6th primorial 2*3*5*7*11*13 + prime(7) = 300030 + 17 = 30047 is a prime.

Mathematica

With[{nn=30}, Select[Total/@Thread[{FoldList[Times, Prime[ Range[ nn]]], Prime[ Range[ 2, nn+1]]}], PrimeQ]] (* Harvey P. Dale, Oct 12 2018 *)

Crossrefs

Cf. A002110, A035346, A005235.

Sequence in context: A205719 A332475 A139515 * A042719 A045717 A197337

Adjacent sequences: A038705 A038706 A038707 * A038709 A038710 A038711

Keyword

nonn

Author

Labos Elemer, May 02 2000

Extensions

Next term has 149 decimal digits.

Status

approved