List of pairs of numbers: {n^2-1, (2*n-1)!!} such that F((2*n-1)!!) = n^2 - 1.

Terms

a(0) =0a(1) =1a(2) =3a(3) =3a(4) =8a(5) =15a(6) =15a(7) =105a(8) =24a(9) =945a(10) =35a(11) =10395a(12) =48a(13) =135135a(14) =63a(15) =2027025a(16) =80a(17) =34459425a(18) =99a(19) =654729075a(20) =120a(21) =13749310575a(22) =143a(23) =316234143225a(24) =168a(26) =195a(28) =224a(30) =255a(32) =288