Prime numbers where digit values decrease while alternating parity.

Terms

a(0) =2a(1) =3a(2) =5a(3) =7a(4) =41a(5) =43a(6) =61a(7) =83a(8) =521a(9) =541a(10) =743a(11) =761a(12) =941a(13) =983a(14) =6521a(15) =8521a(16) =8543a(17) =8741a(18) =8761a(19) =76541a(20) =76543a(21) =94321a(22) =98321a(23) =98543