a(n) = A069540(n)/5.

Terms

a(0) =1a(1) =10a(2) =28a(3) =46a(4) =64a(5) =82a(6) =100a(7) =208a(8) =226a(9) =244a(10) =262a(11) =280a(12) =406a(13) =424a(14) =442a(15) =460a(16) =604a(17) =622a(18) =640a(19) =802a(20) =820a(21) =1000a(22) =2008a(23) =2026a(24) =2044a(25) =2062a(26) =2080a(27) =2206a(28) =2224a(29) =2242