Primes which can be expressed as concatenation of powers of 4 and 0's.

Terms

a(0) =11a(1) =41a(2) =101a(3) =401a(4) =641a(5) =1601a(6) =4001a(7) =4111a(8) =4441a(9) =10111a(10) =10141a(11) =11161a(12) =11411a(13) =14011a(14) =14401a(15) =14411a(16) =16001a(17) =16111a(18) =16141a(19) =16411a(20) =25601a(21) =40111a(22) =40961a(23) =41011a(24) =41141a(25) =41161a(26) =41411a(27) =41611a(28) =41641a(29) =44041