A239877 Numbers k that divide A239876(k).

1, 2, 6, 14, 23, 93, 95, 343, 1924, 13358, 27385, 54709, 150554, 445242, 581211, 589819, 14733535, 18859421, 19861702, 371619757, 775908129, 1076759948, 1083679128, 7402437933, 42679464436

Offset

1,2

Comments

Values of k for which A239876(k) / k is an integer.

A239876 = partial sums of A229110 where A229110(n) = antisigma(n) mod n = A024816(n) mod n.

a(26) > 3*10^11. - Giovanni Resta, Mar 29 2014

Links

Table of n, a(n) for n=1..25.

Example

a(4) = 14 is in the sequence because A239876(14) / 14 = 70 / 14 = 5 is an integer.

Prog

(Magma) [n: n in [1..1000] | u eq 0 where u is ((&+[(k*(k+1)div 2 - SumOfDivisors (k)) mod k: k in [1..n]]) mod n)]

Crossrefs

Cf. A024816, A229110, A239876.

Sequence in context: A119844 A016060 A307643 * A032386 A074329 A109592

Adjacent sequences: A239874 A239875 A239876 * A239878 A239879 A239880

Keyword

nonn

Author

Jaroslav Krizek, Mar 29 2014

Extensions

a(13)-a(25) from Giovanni Resta, Mar 29 2014

Status

approved