T(n,0) + T(n,1) + ... + T(n,n), T given by A026714.

Terms

a(0) =1a(1) =2a(2) =5a(3) =12a(4) =29a(5) =68a(6) =163a(7) =376a(8) =895a(9) =2046a(10) =4845a(11) =11018a(12) =25997a(13) =58930a(14) =138699a(15) =313756a(16) =737185a(17) =1665342a(18) =3908059a(19) =8820378a(20) =20681069a(21) =46646884a(22) =109305969a(23) =246433804a(24) =577207671a(25) =1300924056a(26) =3046122447a(27) =6863883442a(28) =16068177699