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

 

Logo

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 56th year, we are closing in on 350,000 sequences, and we’ve crossed 9,700 citations (which often say “discovered thanks to the OEIS”).

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A179012 Primes that are the sum of three consecutive composite odd numbers. 1
61, 73, 107, 163, 197, 233, 263, 271, 331, 397, 409, 419, 467, 523, 571, 599, 677, 691, 757, 827, 839, 883, 929, 997, 1039, 1051, 1063, 1097, 1123, 1153, 1163, 1171, 1187, 1223, 1231, 1291, 1301, 1367, 1433, 1493, 1523, 1531, 1571, 1619, 1627, 1637, 1667, 1693, 1783 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

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

EXAMPLE

15+21+25=61, 21+25+27=73, 33+35+39=107.

MATHEMATICA

lst={}; Do[If[!PrimeQ[n], s=n; k=1, Continue[]]; If[!PrimeQ[n+2], s+=n+2; k=2; q=2, If[!PrimeQ[n+4], s+=n+4; k=2; q=4, If[!PrimeQ[n+6], s+=n+6; k=2; q=6]]]; If[!PrimeQ[n+q+2], s+=n+q+2; k=3; q+=2, If[!PrimeQ[n+q+4], s+=n+q+4; k=3; q+=4, If[!PrimeQ[n+q+6], s+=n+q+6; k=3; q+=6]]]; If[PrimeQ[s], AppendTo[lst, s]], {n, 9, 6!, 2}]; lst

nn=1001; With[{compodd=Complement[Range[9, nn, 2], Prime[Range[ PrimePi[ nn]]]]}, Select[ Total/@ Partition[compodd, 3, 1], PrimeQ]] (* Harvey P. Dale, Dec 09 2012 *)

CROSSREFS

Cf. A034962, A034965, A082246, A179007.

Sequence in context: A039478 A109549 A139944 * A227980 A227520 A033236

Adjacent sequences:  A179009 A179010 A179011 * A179013 A179014 A179015

KEYWORD

nonn

AUTHOR

Vladimir Joseph Stephan Orlovsky, Jan 07 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 December 9 02:23 EST 2021. Contains 349624 sequences. (Running on oeis4.)