a(n) = 1, 7, A011557*(period 6: repeat 10, 13, 31, 49, 70, 97).

Terms

a(0) =1a(1) =7a(2) =10a(3) =13a(4) =31a(5) =49a(6) =70a(7) =97a(8) =100a(9) =130a(10) =310a(11) =490a(12) =700a(13) =970a(14) =1000a(15) =1300a(16) =3100a(17) =4900a(18) =7000a(19) =9700a(20) =10000a(21) =13000a(22) =31000a(23) =49000a(24) =70000a(25) =97000a(26) =100000a(27) =130000a(28) =310000a(29) =490000