a(n) = A000045(n) - A113405(n).

Terms

a(0) =0a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =-1a(8) =-7a(9) =-23a(10) =-59a(11) =-139a(12) =-311a(13) =-677a(14) =-1443a(15) =-3031a(16) =-6295a(17) =-12967a(18) =-26543a(19) =-54073a(20) =-109743a(21) =-222071a(22) =-448323a(23) =-903411a(24) =-1817767a(25) =-3653245a(26) =-7335147a(27) =-14716663a(28) =-29508351a(29) =-59138095