a(n) = s(1)*s(2)*...*s(n)*(1/s(1) - 1/s(2) + ... + c/s(n)), where c = (-1)^(n+1) and s(k) = 4*k - 3 for k = 1, 2, 3, ....
A024383
a(n) = s(1)*s(2)*...*s(n)*(1/s(1) - 1/s(2) + ... + c/s(n)), where c = (-1)^(n+1) and s(k) = 4*k - 3 for k = 1, 2, 3, ....
Terms
- a(0) =1a(1) =4a(2) =41a(3) =488a(4) =8881a(5) =176556a(6) =4622745a(7) =128838480a(8) =4403082465a(9) =157917434580
External references
- oeis: A024383