68474

Appears in sequences

• Numbers k such that k and k^2 have the same set of digits.at n=25A029793
• Numbers k such that k and k^2 use only the digits 0, 4, 6, 7 and 8.at n=14A136954
• Numbers k such that k and k^2 use only the digits 1, 4, 6, 7 and 8.at n=15A137052
• Numbers k such that k and k^2 use only the digits 2, 4, 6, 7 and 8.at n=29A137101
• Numbers k such that k and k^2 use only the digits 3, 4, 6, 7 and 8.at n=8A137127
• Numbers k such that k and k^2 use only the digits 4, 5, 6, 7 and 8.at n=16A137140
• Numbers k such that k and k^2 use only the digits 4, 6, 7 and 8.at n=3A137144
• Numbers k such that k and k^2 use only the digits 4, 6, 7, 8 and 9.at n=13A137145
• Numbers n such that the decimal expansions of both n and n^2 have 4 as the digit with the smallest value and 8 as the digit with the largest value.at n=4A254071
• Zeroless numbers n such that n and n^2 have the same set of decimal digits.at n=9A257763
• Numbers n such that both n and n squared contain exactly the same digits, and n is not divisible by 10.at n=15A258231
• Numbers k such that k, k+1 and k+2 have exactly 4 distinct prime factors.at n=12A364309
• Numbers k such that k^2, (k+1)^2 and (k+2)^2 are all abundant numbers.at n=23A383391
• a(n) = Sum_{k=0..n} binomial(n,k)^3 * abs(Stirling1(2*k,k)) * abs(Stirling1(2*n-2*k,n-k)).at n=4A384496