A098874 Where A098018(k)=-n.

3, 18, 12, 108, 24, 72, 168, 384, 360, 456, 720, 1824, 1368, 3192, 19260, 6840, 13680, 21000, 80940, 9576, 50616, 39120, 220248, 167808, 264264, 193800, 242820, 181944, 117360, 424080, 456456, 848160, 124488, 2756520, 1618344, 3269112, 2229840

Offset

1,1

Comments

k is the first occurrence of -n in A098018.

Links

Table of n, a(n) for n=1..37.

Mathematica

f[n_] := Plus @@ MoebiusMu[ Drop[ Divisors[n], 1] - 1]; s = Table[0, {100}]; Do[ a = f[n]; If[ !Positive[a] && a > -101 && s[[ -a]] == 0, s[[ -a]] = n], {n, }]; s

Crossrefs

Cf. A098018, A098869.

Sequence in context: A324889 A281791 A281722 * A077104 A073815 A212994

Adjacent sequences: A098871 A098872 A098873 * A098875 A098876 A098877

Keyword

nonn

Author

Leroy Quet and Robert G. Wilson v, Nov 03 2004

Status

approved