Sums of 4 distinct powers of 5.

Terms

a(0) =156a(1) =656a(2) =756a(3) =776a(4) =780a(5) =3156a(6) =3256a(7) =3276a(8) =3280a(9) =3756a(10) =3776a(11) =3780a(12) =3876a(13) =3880a(14) =3900a(15) =15656a(16) =15756a(17) =15776a(18) =15780a(19) =16256a(20) =16276a(21) =16280a(22) =16376a(23) =16380a(24) =16400a(25) =18756a(26) =18776a(27) =18780a(28) =18876a(29) =18880