Delete all odd digits from n.

Terms

a(0) =0a(1) =0a(2) =2a(3) =0a(4) =4a(5) =0a(6) =6a(7) =0a(8) =8a(9) =0a(10) =0a(11) =0a(12) =2a(13) =0a(14) =4a(15) =0a(16) =6a(17) =0a(18) =8a(19) =0a(20) =20a(21) =2a(22) =22a(23) =2a(24) =24a(25) =2a(26) =26a(27) =2a(28) =28a(29) =2