a(n) = Sum_{k=1..n-1} (k OR n-k).

Terms

a(0) =1a(1) =6a(2) =8a(3) =16a(4) =25a(5) =42a(6) =44a(7) =56a(8) =69a(9) =94a(10) =108a(11) =136a(12) =165a(13) =210a(14) =208a(15) =224a(16) =241a(17) =278a(18) =296a(19) =336a(20) =377a(21) =442a(22) =460a(23) =504a(24) =549a(25) =622a(26) =668a(27) =744a(28) =821a(29) =930