a(n) is the numerator of Sum_{k=1..n} (-1)^(k+1) / (2*k-1)!!.
A354298
a(n) is the numerator of Sum_{k=1..n} (-1)^(k+1) / (2*k-1)!!.
Terms
- a(0) =1a(1) =2a(2) =11a(3) =76a(4) =137a(5) =7534a(6) =97943a(7) =1469144a(8) =24975449a(9) =94906706a(10) =9965204131a(11) =229199695012
External references
- oeis: A354298