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%I #17 Sep 08 2022 08:45:33
%S 6,36,300,1176,7260,14196,41616,64980,139656,353220,461280,936396,
%T 1412040,1708476,2438736,3943836,6056940,6921060,10073316,12703320,
%U 14196456,19471920,23725716,31367160,44259936,52025100,56270136
%N a(n) = ((n-th prime)^4-(n-th prime)^2)/2.
%H Vincenzo Librandi, <a href="/A138418/b138418.txt">Table of n, a(n) for n = 1..200</a>
%F a(n) = A138402(n)/2. - _R. J. Mathar_, Oct 15 2017
%F a(n) = binomial(prime(n)^2, 2) = A000217(A001248(n)). - _Jon Maiga_, Nov 14 2018
%t a = {}; Do[p = Prime[n]; AppendTo[a, (p^4 - p^2)/2], {n, 1, 50}]; a
%o (Magma) [(NthPrime((n))^4 - NthPrime((n))^2)/2: n in [1..30] ]; // _Vincenzo Librandi_, Jun 17 2011
%o (PARI) forprime(p=2,1e3,print1((p^4-p^2)/2", ")) \\ _Charles R Greathouse IV_, Jul 15 2011
%K nonn,easy
%O 1,1
%A _Artur Jasinski_, Mar 19 2008
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