1,45

Seiichi Manyama, Table of n, a(n) for n = 1..150

Index entries for sequences related to Egyptian fractions

1 = 1/2+1/4+1/9+1/12+1/18 = 1/2+1/5+1/6+1/12+1/20. The sum of the denominators of each of these is 45, these are the only 2 with sum of denominators = 45, so a(45)=2.

A051882 lists n such that a(n)=0.

Cf. A051908.

Sequence in context: A022882 A171919 A000089 * A178176 A093569 A073091

Adjacent sequences: A051904 A051905 A051906 * A051908 A051909 A051910

nonn

Jud McCranie, Dec 16 1999

R. L. Graham showed that a(n)>0 for n>77.

approved