44747

Appears in sequences

• Numbers k such that k and k^2 use only the digits 0, 2, 4, 7 and 9.at n=27A136907
• a(n) = a(n-1)+a(n-2)+n+2, a(0)=a(1)=1.at n=19A210678
• Semiprimes whose decimal representation has only digits in {4,5,7}.at n=38A217124
• Numbers with digits 4 and 7 only.at n=35A284971
• 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.at n=37A302938