Number of ways 1/n can be expressed as the sum of four distinct unit fractions: 1/n = 1/w + 1/x + 1/y + 1/z satisfying 0 < w < x < y < z.
A241883
Number of ways 1/n can be expressed as the sum of four distinct unit fractions: 1/n = 1/w + 1/x + 1/y + 1/z satisfying 0 < w < x < y < z.
Terms
- a(0) =6a(1) =71a(2) =272a(3) =586a(4) =978a(5) =1591a(6) =1865a(7) =3115a(8) =3772a(9) =4964a(10) =4225a(11) =8433a(12) =4987a(13) =10667a(14) =13659a(15) =10845a(16) =7513a(17) =17360a(18) =9569a(19) =28554a(20) =23309a(21) =17220a(22) =12326a(23) =37554a(24) =19984a(25) =24091a(26) =31056a(27) =42343a(28) =16095a(29) =57001
External references
- oeis: A241883