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A240471 Integer part of (n * A000005(n) / A000203(n)). 5

%I #7 Dec 02 2020 03:20:03

%S 1,1,1,1,1,2,1,2,2,2,1,2,1,2,2,2,1,2,1,2,2,2,1,3,2,2,2,3,1,3,1,3,2,2,

%T 2,3,1,2,2,3,1,3,1,3,3,2,1,3,2,3,2,3,1,3,3,3,2,2,1,4,1,2,3,3,3,3,1,3,

%U 2,3,1,4,1,2,3,3,3,3,1,4,3,2,1,4,3,2

%N Integer part of (n * A000005(n) / A000203(n)).

%H Reinhard Zumkeller, <a href="/A240471/b240471.txt">Table of n, a(n) for n = 1..10000</a>

%F a(n) = (A038040(n) - A106315(n)) / A000203(n);

%F a(A046022(n)) = 1.

%o (Haskell) a240471 n = n * a000005 n `div` a000203 n

%o (PARI) a(n) = n*numdiv(n)\sigma(n); \\ _Michel Marcus_, Dec 02 2020

%Y Cf. A000005, A000203, A038040, A046022, A106315.

%K nonn

%O 1,6

%A _Reinhard Zumkeller_, Apr 06 2014

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Last modified April 24 22:17 EDT 2024. Contains 371964 sequences. (Running on oeis4.)