Some nontrivial permutation of digits gives an even number.

Terms

a(0) =20a(1) =21a(2) =22a(3) =23a(4) =24a(5) =25a(6) =26a(7) =27a(8) =28a(9) =29a(10) =40a(11) =41a(12) =42a(13) =43a(14) =44a(15) =45a(16) =46a(17) =47a(18) =48a(19) =49a(20) =60a(21) =61a(22) =62a(23) =63a(24) =64a(25) =65a(26) =66a(27) =67a(28) =68a(29) =69