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A166329 Products of squares of 2 successive primes. 6
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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified April 1 05:33 EDT 2020. Contains 333155 sequences. (Running on oeis4.)