Super-7 Numbers (7 * n^7 contains substring '7777777' in its decimal expansion).

Terms

a(0) =140997a(1) =490996a(2) =1184321a(3) =1259609a(4) =1409970a(5) =1783166a(6) =1886654a(7) =1977538a(8) =2457756a(9) =2714763a(10) =2750425a(11) =2980991a(12) =3043607a(13) =3283057a(14) =3689639a(15) =4191601a(16) =4258476a(17) =4642725a(18) =4909960a(19) =4973029a(20) =5242829a(21) =5349973a(22) =5444788a(23) =5523544a(24) =5682065