a(n) = numerator( (1/(4*n + 2))*Sum_{i=0..2*n} (-1)^i/(2*i+1) ).
A392685
a(n) = numerator( (1/(4*n + 2))*Sum_{i=0..2*n} (-1)^i/(2*i+1) ).
Terms
- a(0) =1a(1) =13a(2) =263a(3) =36979a(4) =622637a(5) =11757173a(6) =1346255081a(7) =116752370597
External references
- oeis: A392685