Starts of runs of 4 consecutive Gray-code Niven numbers (A344341).

Terms

a(0) =1a(1) =6a(2) =30a(3) =126a(4) =510a(5) =543a(6) =783a(7) =903a(8) =2046a(9) =2093a(10) =3773a(11) =3903a(12) =7133a(13) =7743a(14) =8190a(15) =8223a(16) =8703a(17) =10087a(18) =12303a(19) =12543a(20) =14343a(21) =14463a(22) =15423a(23) =15903a(24) =16143a(25) =16263a(26) =20167a(27) =22687a(28) =27727a(29) =30247