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A081218 Greatest squarefree number not exceeding n-th prime power which is not prime. 2

%I

%S 1,3,7,7,15,23,26,31,47,62,79,119,123,127,167,241,255,287,341,359,511,

%T 527,623,727,839,959,1023,1330,1367,1679,1847,2047,2186,2195,2207,

%U 2399,2807,3122,3478,3719,4094,4487,4911,5039,5327,6239,6559,6857,6887,7919

%N Greatest squarefree number not exceeding n-th prime power which is not prime.

%C a(n) = A070321(A025475(n)).

%Y Cf. A081217.

%K nonn

%O 1,2

%A _Reinhard Zumkeller_, Mar 10 2003

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Last modified April 3 12:06 EDT 2020. Contains 333196 sequences. (Running on oeis4.)