Binomial transform of A026641.

Terms

a(0) =1a(1) =2a(2) =7a(3) =29a(4) =127a(5) =572a(6) =2623a(7) =12182a(8) =57115a(9) =269750a(10) =1281457a(11) =6116585a(12) =29310721a(13) =140925176a(14) =679493983a(15) =3284357789a(16) =15909178627a(17) =77208716606a(18) =375330428293