Binomial transform of A077947.

Terms

a(0) =1a(1) =2a(2) =5a(3) =15a(4) =46a(5) =139a(6) =417a(7) =1250a(8) =3749a(9) =11247a(10) =33742a(11) =101227a(12) =303681a(13) =911042a(14) =2733125a(15) =8199375a(16) =24598126a(17) =73794379a(18) =221383137a(19) =664149410a(20) =1992448229a(21) =5977344687a(22) =17932034062a(23) =53796102187a(24) =161388306561a(25) =484164919682