login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A108420 Numbers n such that n!! + prime(n) is prime. 0
3, 14, 20, 54, 56, 144, 206, 212, 436, 1610, 4450, 4512, 5202, 6684 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

There is no further term up to 8800. - Farideh Firoozbakht, Aug 19 2005

LINKS

Table of n, a(n) for n=1..14.

MATHEMATICA

Select[Range[1610], PrimeQ[ #!! - Prime[ # ]] &]

CROSSREFS

Cf. A007749, A064401.

Sequence in context: A063633 A108933 A271384 * A015639 A019000 A305090

Adjacent sequences:  A108417 A108418 A108419 * A108421 A108422 A108423

KEYWORD

nonn

AUTHOR

Amineh Farzannia (afarzannia(AT)yahoo.com), Jul 06 2005

EXTENSIONS

More terms from Farideh Firoozbakht, Aug 19 2005

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified June 24 17:34 EDT 2021. Contains 345418 sequences. (Running on oeis4.)