a(n) = numerator of Sum_{k=1..n} 1/(2*k-1)!!.
A289381
a(n) = numerator of Sum_{k=1..n} 1/(2*k-1)!!.
Terms
- a(0) =1a(1) =4a(2) =7a(3) =148a(4) =1333a(5) =4888a(6) =190633a(7) =2859496a(8) =1246447a(9) =923617228a(10) =19395961789a(11) =11438644132
External references
- oeis: A289381