Numbers in which all pairs of consecutive base-4 digits differ by 2.

Terms

a(0) =1a(1) =2a(2) =3a(3) =7a(4) =8a(5) =13a(6) =29a(7) =34a(8) =55a(9) =119a(10) =136a(11) =221a(12) =477a(13) =546a(14) =887a(15) =1911a(16) =2184a(17) =3549a(18) =7645a(19) =8738a(20) =14199a(21) =30583a(22) =34952a(23) =56797a(24) =122333a(25) =139810a(26) =227191a(27) =489335a(28) =559240a(29) =908765