Numerators b(n) of Pythagorean approximations b(n)/a(n) to 1/4.

Terms

a(0) =0a(1) =7a(2) =9a(3) =16a(4) =399a(5) =657a(6) =1040a(7) =26391a(8) =43289a(9) =68640a(10) =1741343a(11) =2856481a(12) =4529184a(13) =114902311a(14) =188484393a(15) =298857520a(16) =7581811119a(17) =12437113521a(18) =19720067120a(19) =500284631607a(20) =820661007929