A166329 Products of squares of 2 successive primes.

36, 225, 1225, 5929, 20449, 48841, 104329, 190969, 444889, 808201, 1315609, 2301289, 3108169, 4084441, 6205081, 9778129, 12952801, 16703569, 22629049, 26863489, 33258289, 42994249, 54567769, 74528689, 95981209, 108222409

Offset

1,1

Links

G. C. Greubel, Table of n, a(n) for n = 1..5000

Formula

a(n) = A006094(n)^2. - Michel Marcus, May 10 2016

Example

2^2*3^2 = 36, 3^2*5^2 = 225, 5^2*7^2 = 1225, ..

Mathematica

Array[Prime[ # ]*Prime[ # ]*Prime[ #+1]*Prime[ #+1]&, 5! ]
Times@@@(Partition[Prime[Range[30]], 2, 1]^2) (* Harvey P. Dale, Apr 12 2018 *)

Prog

(PARI) a(n) = prime(n)^2*prime(n+1)^2; \\ Michel Marcus, May 10 2016
(Magma) [NthPrime(n)^2*NthPrime(n+1)^2: n in [1..30]]; // Vincenzo Librandi, May 10 2016

Crossrefs

Cf. A006094, A152241.

Sequence in context: A237252 A017234 A112474 * A264522 A297656 A268794

Adjacent sequences: A166326 A166327 A166328 * A166330 A166331 A166332

Keyword

nonn,easy

Author

Vladimir Joseph Stephan Orlovsky, Oct 11 2009

Extensions

Edited by N. J. A. Sloane, Oct 13 2009

Status

approved