Denominators of a BBP series for Pi/4.

Terms

a(0) =1a(1) =-8a(2) =-20a(3) =-24a(4) =144a(5) =-384a(6) =-832a(7) =-896a(8) =4352a(9) =-10240a(10) =-21504a(11) =-22528a(12) =102400a(13) =-229376a(14) =-475136a(15) =-491520a(16) =2162688a(17) =-4718592a(18) =-9699328a(19) =-9961472a(20) =42991616a(21) =-92274688a(22) =-188743680a(23) =-192937984a(24) =822083584a(25) =-1744830464a(26) =-3556769792a(27) =-3623878656a(28) =15300820992a(29) =-32212254720