Triangle related to T(x,2x).

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =3a(5) =1a(6) =3a(7) =9a(8) =7a(9) =1a(10) =6a(11) =20a(12) =28a(13) =15a(14) =1a(15) =10a(16) =50a(17) =85a(18) =75a(19) =31a(20) =1a(21) =20a(22) =105a(23) =255a(24) =294a(25) =186a(26) =63a(27) =1a(28) =35a(29) =245