Numbers having four 1's in base 5.

Terms

a(0) =156a(1) =656a(2) =756a(3) =776a(4) =780a(5) =782a(6) =783a(7) =784a(8) =786a(9) =791a(10) =796a(11) =806a(12) =831a(13) =856a(14) =906a(15) =1031a(16) =1156a(17) =1406a(18) =2031a(19) =2656a(20) =3156a(21) =3256a(22) =3276a(23) =3280a(24) =3282a(25) =3283a(26) =3284a(27) =3286a(28) =3291a(29) =3296