login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A061466 Product of primes prime(3*n+1), prime(3*n+2), prime(3*n+3). 1

%I #21 Sep 08 2022 08:45:03

%S 30,1001,7429,33263,82861,190747,347261,583573,1009091,1317919,

%T 2279269,3127361,4273697,5605027,7262011,9363547,12112039,14457349,

%U 18181979,21093827,25456133,30857731,38706809,44227723,51881689,59147839

%N Product of primes prime(3*n+1), prime(3*n+2), prime(3*n+3).

%H Harry J. Smith, <a href="/A061466/b061466.txt">Table of n, a(n) for n = 0..1000</a>

%e 2*3*5 = 30; 7*11*13 = 1001; ...

%t f[n_] := Prime[3n + 1] Prime[3n + 2] Prime[3n + 3]; Array[f, 26, 0] (* _Robert G. Wilson v_, Apr 11 2011 *)

%o (PARI) { for (n=0, 1000, i=3*n + 1; p=prime(i)*prime(i + 1)*prime(i + 2); write("b061466.txt", n, " ", p) ) } \\ _Harry J. Smith_, Jul 23 2009

%o (Magma) [&*[NthPrime(n+k): k in [0..2]]: n in [1..78 by 3]]; // _Bruno Berselli_, Apr 11 2011

%o (Sage) [product(nth_prime(k) for k in (3*n+1..3*n+3)) for n in (0..30)] # _G. C. Greubel_, Jan 07 2019

%K nonn

%O 0,1

%A _Jason Earls_, Jun 11 2001

%E Better description and more terms from Larry Reeves (larryr(AT)acm.org), Jun 22 2001

%E Offset changed from 2 to 0 by _Harry J. Smith_, Jul 23 2009

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 19 09:23 EDT 2024. Contains 371782 sequences. (Running on oeis4.)