a(n) = [ 1/{n*sqrt(2)} ], where {x} := x - [ x ].

Terms

a(0) =2a(1) =1a(2) =4a(3) =1a(4) =14a(5) =2a(6) =1a(7) =3a(8) =1a(9) =7a(10) =1a(11) =1a(12) =2a(13) =1a(14) =4a(15) =1a(16) =24a(17) =2a(18) =1a(19) =3a(20) =1a(21) =8a(22) =1a(23) =1a(24) =2a(25) =1a(26) =5a(27) =1a(28) =82a(29) =2