a(n) = Sum_{k = ceiling(n/2)..n-1} A354169(k).

Terms

a(0) =0a(1) =0a(2) =1a(3) =2a(4) =6a(5) =12a(6) =15a(7) =27a(8) =59a(9) =115a(10) =127a(11) =252a(12) =508a(13) =1004a(14) =1021a(15) =2013a(16) =2047a(17) =4031a(18) =8127a(19) =16307a(20) =16375a(21) =32631a(22) =32767a(23) =65279a(24) =130815a(25) =261375a(26) =262143a(27) =524270a(28) =1048558a(29) =2096110