login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A185347 Semiprimes that are the sum of 10 consecutive primes. 1
129, 158, 382, 1114, 1546, 2374, 2582, 3446, 3578, 6218, 6826, 7978, 8266, 9298, 9382, 10202, 12946, 14002, 15178, 15406, 15766, 16382, 16466, 17282, 17362, 18374, 18838, 19226, 19606, 23878, 24074, 25154, 25642, 26206, 29782, 30034, 30638, 32902, 33526, 34862, 34934, 35678, 35978, 36602 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Or, semiprimes in A127337 (Numbers that are the sum of 10 consecutive primes).

a(1) = 3*43, all other terms are of the form 2*prime.

LINKS

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

MATHEMATICA

(* First run the program for A109611 to define semiPrimeQ *) Select[Table[Plus@@Prime[Range[n, n + 9]], {n, 500}], semiPrimeQ] (* Alonso del Arte, Feb 15 2011 *)

Select[Total/@Partition[Prime[Range[600]], 10, 1], PrimeOmega[#]==2&] (* Harvey P. Dale, Sep 06 2014 *)

PROG

(PARI) {s=129; for(n=1, 2000, if(2==bigomega(s),

      print1(s", ")); s=s-prime(n)+prime(n+10))} // Zak Seidov, Feb 15 2011

CROSSREFS

Cf. A127337.

Sequence in context: A230092 A060878 A127337 * A034072 A235879 A157951

Adjacent sequences:  A185344 A185345 A185346 * A185348 A185349 A185350

KEYWORD

nonn

AUTHOR

Zak Seidov, Feb 15 2011

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 October 20 11:18 EDT 2019. Contains 328257 sequences. (Running on oeis4.)