a(n) = numerator of Product_{k=1..n} (1 + {n/k}), where {x} is the fractional part of x, {x} = x - floor(x).
A128778
a(n) = numerator of Product_{k=1..n} (1 + {n/k}), where {x} is the fractional part of x, {x} = x - floor(x).
Terms
- a(0) =1a(1) =1a(2) =3a(3) =4a(4) =25a(5) =9a(6) =343a(7) =256a(8) =6561a(9) =1250a(10) =161051a(11) =1728a(12) =4826809a(13) =235298a(14) =11390625a(15) =134217728a(16) =6975757441a(17) =14348907a(18) =322687697779a(19) =4000000000a(20) =264760015527a(21) =207499396808a(23) =220150628352
External references
- oeis: A128778