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A085272 a(n) = lcm_{k=1..n} (prime(k) + 1). 1

%I #13 Jun 30 2023 07:04:52

%S 3,12,12,24,24,168,504,2520,2520,2520,10080,191520,191520,2106720,

%T 2106720,6320160,6320160,195924960,3330724320,3330724320,123236799840,

%U 123236799840,123236799840,123236799840,862657598880,862657598880

%N a(n) = lcm_{k=1..n} (prime(k) + 1).

%H Hugo Pfoertner, <a href="/A085272/b085272.txt">Table of n, a(n) for n = 1..1480</a>

%e a(6) = lcm(2+1, 3+1, 5+1, 7+1, 11+1, 13+1} = lcm(3, 2^2, 2*3, 2^3, 3*2^2, 2*7) = 7*3*2^3 = 168.

%o (PARI) a(n) = lcm(vector(n, k, prime(k)+1)); \\ _Michel Marcus_, Mar 15 2018

%Y Cf. A008864, A003418, A002110, A058254.

%K nonn

%O 1,1

%A _Reinhard Zumkeller_, Aug 12 2003

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Last modified July 13 22:24 EDT 2024. Contains 374288 sequences. (Running on oeis4.)