a(n) is the numerator of Product_{i=1..n} (1/(1-1/prime(i))) - 1.
A254196
a(n) is the numerator of Product_{i=1..n} (1/(1-1/prime(i))) - 1.
Terms
- a(0) =1a(1) =2a(2) =11a(3) =27a(4) =61a(5) =809a(6) =13945a(7) =268027a(8) =565447a(9) =2358365a(10) =73551683a(11) =2734683311a(12) =112599773191
External references
- oeis: A254196