Product of first n terms of continued fraction expansion of Pi.

Terms

a(0) =3a(1) =21a(2) =315a(3) =315a(4) =91980a(5) =91980a(6) =91980a(7) =91980a(8) =183960a(9) =183960a(10) =551880a(11) =551880a(12) =7726320a(13) =15452640a(14) =15452640a(15) =15452640a(16) =30905280a(17) =61810560a(18) =123621120a(19) =247242240a(20) =247242240a(21) =20768348160a(22) =41536696320a(23) =41536696320a(24) =41536696320a(25) =623050444800