Numbers of the form 4^j + 9^k, for j and k >= 0.

Terms

a(0) =2a(1) =5a(2) =10a(3) =13a(4) =17a(5) =25a(6) =65a(7) =73a(8) =82a(9) =85a(10) =97a(11) =145a(12) =257a(13) =265a(14) =337a(15) =730a(16) =733a(17) =745a(18) =793a(19) =985a(20) =1025a(21) =1033a(22) =1105a(23) =1753a(24) =4097a(25) =4105a(26) =4177a(27) =4825a(28) =6562a(29) =6565