Numbers in which all pairs of consecutive digits differ by 2.

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =5a(5) =6a(6) =7a(7) =8a(8) =9a(9) =13a(10) =20a(11) =24a(12) =31a(13) =35a(14) =42a(15) =46a(16) =53a(17) =57a(18) =64a(19) =68a(20) =75a(21) =79a(22) =86a(23) =97a(24) =131a(25) =135a(26) =202a(27) =242a(28) =246a(29) =313