a(n) is the number of integers that can be represented in a 7-segment display by using only n segments (version A063720).
A350439
a(n) is the number of integers that can be represented in a 7-segment display by using only n segments (version A063720).
Terms
- a(0) =0a(1) =0a(2) =1a(3) =2a(4) =3a(5) =9a(6) =12a(7) =20a(8) =35a(9) =58a(10) =116a(11) =180a(12) =329a(13) =560a(14) =970a(15) =1742a(16) =2933a(17) =5213a(18) =8954a(19) =15627a(20) =27340a(21) =47171a(22) =82661a(23) =143054a(24) =249474a(25) =434167a(26) =754011a(27) =1314511a(28) =2282754a(29) =3975774
External references
- oeis: A350439