cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

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

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%I A085272 #16 Aug 24 2024 18:21:12
%S A085272 3,12,12,24,24,168,504,2520,2520,2520,10080,191520,191520,2106720,
%T A085272 2106720,6320160,6320160,195924960,3330724320,3330724320,123236799840,
%U A085272 123236799840,123236799840,123236799840,862657598880,862657598880
%N A085272 a(n) = lcm_{k=1..n} (prime(k) + 1).
%H A085272 Hugo Pfoertner, <a href="/A085272/b085272.txt">Table of n, a(n) for n = 1..1480</a>
%e A085272 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 A085272 (PARI) a(n) = lcm(vector(n, k, prime(k)+1)); \\ _Michel Marcus_, Mar 15 2018
%Y A085272 Cf. A008864, A003418, A002110, A058254.
%K A085272 nonn,easy
%O A085272 1,1
%A A085272 _Reinhard Zumkeller_, Aug 12 2003