30000

Appears in sequences

• a(n) = floor(10000*log_2(n)).at n=7A004268
• a(n) = round(10000*log_2(n)).at n=7A004269
• a(n) = ceiling(10000*log_2(n)).at n=7A004270
• Cubes written in base 9.at n=26A004639
• Powers of 3 written in base 9.at n=9A004663
• Powers of 3 written in base 27.at n=13A004669
• Numbers k such that k^2 contains exactly 2 distinct digits.at n=31A016069
• n written in fractional base 6/3.at n=48A024636
• Numbers of form 3^i*10^j, with i, j >= 0.at n=29A025616
• Numbers k such that k^2+k+9 is a palindrome.at n=22A027726
• Numbers k such that k^2 has digits in nonincreasing order.at n=40A028821
• Numbers k that divide the (right) concatenation of all numbers <= k written in base 5 (most significant digit on left).at n=24A029450
• a(n) is the smallest k > a(n-1) such that k^2 has no digit in common with a(n-1)^2.at n=50A030287
• Numbers k such that k^3 has at most three different digits.at n=50A030294
• a(1) = 1, a(2) = 16, a(n) = lcm(48, 2n^2) for n>2.at n=24A032444
• Number of possible rook moves on an n X n chessboard.at n=24A035006
• a(n) is root of square starting with digit 9: first term of runs.at n=6A035076
• Numbers that contain only one nonzero digit.at n=38A037124
• Numbers n with property that n is a substring of its base 5 representation.at n=15A038105
• Numbers having four 0's in base 10.at n=2A043492