proposed

approved

editing

proposed

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

a(A046022(n)) = 1.

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

a(A046022(n)) = 1.

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

(PARI) a(n) = n*numdiv(n)\sigma(n); \\ Michel Marcus, Dec 02 2020

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

approved

editing

editing

approved

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

a(A046022(n)) = 1.

a240471 n = n * a000005 n `div` a000203 n

allocated for Reinhard Zumkeller

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

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, 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, 2, 3, 1, 4, 1, 2, 3, 3, 3, 3, 1, 4, 3, 2, 1, 4, 3, 2

1,6

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

allocated

nonn

Reinhard Zumkeller, Apr 06 2014

approved

editing

allocated for Reinhard Zumkeller

allocated

approved