Triangle of numbers in which i-th row is {2^(i-j)*7^j, 0<=j<=i}; i >= 0.

Terms

a(0) =1a(1) =2a(2) =7a(3) =4a(4) =14a(5) =49a(6) =8a(7) =28a(8) =98a(9) =343a(10) =16a(11) =56a(12) =196a(13) =686a(14) =2401a(15) =32a(16) =112a(17) =392a(18) =1372a(19) =4802a(20) =16807a(21) =64a(22) =224a(23) =784a(24) =2744a(25) =9604a(26) =33614a(27) =117649a(28) =128a(29) =448