a(n) = denominator((1/n!)*Sum_{k=1..n} 1/(2*k)).
A377401
a(n) = denominator((1/n!)*Sum_{k=1..n} 1/(2*k)).
Terms
- a(0) =1a(1) =2a(2) =8a(3) =72a(4) =576a(5) =14400a(6) =28800a(7) =470400a(8) =22579200a(9) =1828915200a(10) =18289152000
External references
- oeis: A377401