A triangular sequence designed with row sums 2*3^n.

Terms

a(0) =2a(1) =3a(2) =3a(3) =2a(4) =14a(5) =2a(6) =2a(7) =25a(8) =25a(9) =2a(10) =2a(11) =36a(12) =86a(13) =36a(14) =2a(15) =2a(16) =47a(17) =194a(18) =194a(19) =47a(20) =2a(21) =2a(22) =56a(23) =304a(24) =734a(25) =304a(26) =56a(27) =2a(28) =2a(29) =69