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%I #11 Sep 08 2022 08:44:59
%S 1,6,180,37800,87318000,2622159540000,1338638666765400000,
%T 12984380089637682726000000,2896722619368127899492763620000000,
%U 18740906719713843949122453226304292600000000
%N Chernoff sequence A006939 divided by 2.
%H G. C. Greubel, <a href="/A051357/b051357.txt">Table of n, a(n) for n = 1..37</a>
%F a(n) = Product_{k=1..n} prime(k)^(n-k+1) / 2.
%t Table[Product[Prime[k]^(n - k + 1), {k, 1, n}]/2, {n, 1, 15}] (* _G. C. Greubel_, Oct 14 2018 *)
%o (PARI) for(n=1, 15, print1(prod(k=1,n, prime(k)^(n-k+1))/2, ", ")) \\ _G. C. Greubel_, Oct 14 2018
%o (Magma) [(&*[NthPrime(k)^(n-k+1): k in [1..n]])/2: n in [1..15]]; // _G. C. Greubel_, Oct 14 2018
%K easy,nonn
%O 1,2
%A _Judson Neer_
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