Triangle with n >= k >= 0 where a(n,k) = 2^k*3^(n-k)*(C(n+1,0)+C(n+1,1)+...C(n+1,k)).

Terms

a(0) =1a(1) =3a(2) =6a(3) =9a(4) =24a(5) =28a(6) =27a(7) =90a(8) =132a(9) =120a(10) =81a(11) =324a(12) =576a(13) =624a(14) =496a(15) =243a(16) =1134a(17) =2376a(18) =3024a(19) =2736a(20) =2016a(21) =729a(22) =3888a(23) =9396a(24) =13824a(25) =14256a(26) =11520a(27) =8128a(28) =2187a(29) =13122