62500

Appears in sequences

• a(0) = 1; a(n) = 4*5^(n-1) for n >= 1.at n=7A005054
• a(n) = Product_{i=0..6} floor((n+i)/7).at n=34A009641
• a(n) = (7*n + 5)^2.at n=35A017042
• a(n) = (8*n + 2)^2.at n=31A017090
• a(n) = (9*n + 7)^2.at n=27A017246
• a(n) = (10*n)^2.at n=25A017270
• a(n) = (11*n + 8)^2.at n=22A017486
• a(n) = (12*n+10)^2.at n=20A017642
• Numbers k such that the decimal expansion of k^2 contains k as a substring.at n=31A018834
• Numbers of form 4^i*5^j, with i, j >= 0.at n=34A025617
• Numbers of form 5^i*10^j, with i, j >= 0.at n=22A025625
• a(n) = 5*a(n-2), starting 1,2,4.at n=14A026395
• Squares k^2 in which the digits of k appear.at n=36A029773
• Squares such that digits of sqrt(n) appear in both n and n^(3/2).at n=23A029781
• Substring of both its square and its cube.at n=29A029943
• Smallest nontrivial extension of n^2 which is a square.at n=24A030686
• a(n) = floor(10^6/n).at n=15A033426
• a(n) = 4*n^3.at n=25A033430
• Squares with initial digit '6'.at n=14A045789
• Internal digits of n^2 include digits of n as substring.at n=18A046836