Denominators of A178381(4*n+1)/A178381(4*n).

Terms

a(0) =1a(1) =3a(2) =14a(3) =36a(4) =47a(5) =246a(6) =644a(7) =843a(8) =4414a(9) =11556a(10) =15127a(11) =79206a(12) =207364a(13) =271443a(14) =1421294a(15) =3720996a(16) =4870847a(17) =25504086a(18) =66770564a(19) =87403803a(20) =457652254a(21) =1198149156a(22) =1568397607a(23) =8212236486a(24) =21499914244a(25) =28143753123a(26) =147362604494