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Largest prime preceding distinct values of lcm(1,...,m): Max{p|p < A003418(A000961(n))}. To get different LCM values, the last arguments(m) of LCM were selected from A000961.
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%I #7 Jul 07 2018 19:19:08

%S -2,-2,5,11,59,419,839,2503,27701,360337,720703,12252197,232792559,

%T 5354228879,26771144371,80313433159,2329089562799,72201776446757,

%U 144403552893599,5342931457063157,219060189739591153,9419588158802421517,442720643463713815199

%N Largest prime preceding distinct values of lcm(1,...,m): Max{p|p < A003418(A000961(n))}. To get different LCM values, the last arguments(m) of LCM were selected from A000961.

%e lcm(1,2,3,4,5,6,7,8)=840 is the 7th term in A000961. Primes preceding it, in descending order, are 839, 829, .... So the corresponding prime in this sequence is 839. The first 2 entries come before lcm(1)=1 and lcm(1,2)=2 as 1-3 = -2 and 2-4 = -2.

%Y Cf. A000961, A003418, A051451.

%K sign

%O 0,1

%A _Labos Elemer_, Nov 15 2000