Numbers of the form 7^j + 9^k, for j and k >= 0.

Terms

a(0) =2a(1) =8a(2) =10a(3) =16a(4) =50a(5) =58a(6) =82a(7) =88a(8) =130a(9) =344a(10) =352a(11) =424a(12) =730a(13) =736a(14) =778a(15) =1072a(16) =2402a(17) =2410a(18) =2482a(19) =3130a(20) =6562a(21) =6568a(22) =6610a(23) =6904a(24) =8962a(25) =16808a(26) =16816a(27) =16888a(28) =17536a(29) =23368