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

Terms

a(0) =1a(1) =4a(2) =24a(3) =4a(4) =9a(5) =24a(6) =7a(7) =12a(8) =24a(9) =140a(10) =14a(11) =24a(12) =67a(13) =15a(14) =24a(15) =51a(16) =816a(17) =24a(18) =43a(19) =140a(20) =24a(21) =39a(22) =87a(23) =24a(24) =36a(25) =67a(26) =293a(27) =35a(28) =57a(29) =140