Lexicographically first sequence of distinct terms such that the sum of any two terms is not a term of the sequence, and the sum of any two digits is not a digit of the sequence.
A302938
Lexicographically first sequence of distinct terms such that the sum of any two terms is not a term of the sequence, and the sum of any two digits is not a digit of the sequence.
Terms
- a(0) =1a(1) =2a(2) =4a(3) =7a(4) =44a(5) =47a(6) =74a(7) =77a(8) =444a(9) =447a(10) =474a(11) =477a(12) =744a(13) =747a(14) =774a(15) =777a(16) =4444a(17) =4447a(18) =4474a(19) =4477a(20) =4744a(21) =4747a(22) =4774a(23) =4777a(24) =7444a(25) =7447a(26) =7474a(27) =7477a(28) =7744a(29) =7747
External references
- oeis: A302938