A079705 3p^2 where p runs through the primes.

12, 27, 75, 147, 363, 507, 867, 1083, 1587, 2523, 2883, 4107, 5043, 5547, 6627, 8427, 10443, 11163, 13467, 15123, 15987, 18723, 20667, 23763, 28227, 30603, 31827, 34347, 35643, 38307, 48387, 51483, 56307, 57963, 66603, 68403, 73947, 79707, 83667, 89787, 96123

Offset

1,1

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

Formula

a(n) = 3*A001248(n) = A003415(A030078(n)). - Reinhard Zumkeller, Jun 26 2011

Example

For n = 2, 3*prime(2)^2 = 3*3^2 = 27.

Mathematica

3 #^2 & /@ Prime[Range[40]]
3 Prime[Range[30]]^2 (* Vincenzo Librandi, Mar 27 2014 *)

Prog

(PARI) forprime (p=2, 100, print1(p^2*3, ", "))
(PARI) a(n) = 3*prime(n)^2; \\ Michel Marcus, Dec 27 2021
(Magma) [3*p^2: p in PrimesUpTo(200)]; // Vincenzo Librandi, Mar 27 2014
(Python)
from sympy import primerange
print([3*p**2 for p in primerange(1, 180)]) # Michael S. Branicky, Dec 27 2021

Crossrefs

Sequence in context: A047723 A151542 A069550 * A068721 A228181 A196208

Adjacent sequences: A079702 A079703 A079704 * A079706 A079707 A079708

Keyword

easy,nonn

Author

Jon Perry, Jan 31 2003

Extensions

More terms from Harvey P. Dale, Feb 13 2003

Offset corrected by Vincenzo Librandi, Mar 27 2014

Status

approved