Triangle of coefficients in expansion of (1+8x)^n.

Terms

a(0) =1a(1) =1a(2) =8a(3) =1a(4) =16a(5) =64a(6) =1a(7) =24a(8) =192a(9) =512a(10) =1a(11) =32a(12) =384a(13) =2048a(14) =4096a(15) =1a(16) =40a(17) =640a(18) =5120a(19) =20480a(20) =32768a(21) =1a(22) =48a(23) =960a(24) =10240a(25) =61440a(26) =196608a(27) =262144a(28) =1a(29) =56