Row sums of A053207.

Terms

a(0) =0a(1) =3a(2) =10a(3) =24a(4) =52a(5) =108a(6) =220a(7) =444a(8) =892a(9) =1788a(10) =3580a(11) =7164a(12) =14332a(13) =28668a(14) =57340a(15) =114684a(16) =229372a(17) =458748a(18) =917500a(19) =1835004a(20) =3670012a(21) =7340028a(22) =14680060a(23) =29360124a(24) =58720252a(25) =117440508a(26) =234881020a(27) =469762044a(28) =939524092a(29) =1879048188