a(n) = (A230624(n)-2)/4.

Terms

a(0) =0a(1) =2a(2) =3a(3) =5a(4) =9a(5) =15a(6) =23a(7) =39a(8) =51a(9) =79a(10) =95a(11) =119a(12) =151a(13) =191a(14) =239a(15) =255a(16) =383a(17) =415a(18) =431a(19) =447a(20) =479a(21) =495a(22) =559a(23) =655a(24) =671a(25) =751a(26) =815a(27) =895a(28) =991a(29) =1183