Triangular array: the fission of ((x+2)^n) by ((x+1)^n).

Terms

a(0) =2a(1) =4a(2) =8a(3) =8a(4) =28a(5) =26a(6) =16a(7) =80a(8) =136a(9) =80a(10) =32a(11) =208a(12) =512a(13) =568a(14) =242a(15) =64a(16) =512a(17) =1648a(18) =2672a(19) =2188a(20) =728a(21) =128a(22) =1216a(23) =4832a(24) =10288a(25) =12392a(26) =8020a(27) =2186a(28) =256a(29) =2816