490000

Appears in sequences

• Squares whose digits are squares.at n=25A019544
• Numbers of form 7^i*10^j, with i, j >= 0.at n=25A025632
• Smallest number that has exactly n substrings which are square.at n=11A035237
• Triangle whose (i,j)-th entry is binomial(i,j)*7^(i-j)*10^j.at n=18A038276
• Triangle whose (i,j)-th entry is binomial(i,j)*10^(i-j)*7^j.at n=17A038309
• Squares which are the concatenation of two nonzero squares.at n=24A039686
• Squares in which removing a suitably chosen digit yields another square and this process can be continued until the digits are exhausted.at n=34A062387
• Initial values for f(x)=phi(sigma(x)) such that iteration of f ends in cycle of length=15.at n=2A096889
• Square perimeters of primitive Pythagorean triangles.at n=25A120089
• Squares of the form p1 - 1 where p1 is a lower twin prime.at n=22A145823
• Squares which are concatenation of two positive squares with possible intervening zeros.at n=27A147608
• a(n) = 1, 7, A011557*(period 6: repeat 10, 13, 31, 49, 70, 97).at n=29A178508
• Numbers that are squares and have a majority of one digit.at n=34A182020
• Numbers with prime factorization p^2*q^4*r^4 where p, q, and r are distinct primes.at n=9A190471
• Number of (n+2)X6 binary arrays avoiding patterns 001 and 011 in rows and columns.at n=4A202096
• Number of (n+2)X7 binary arrays avoiding patterns 001 and 011 in rows and columns.at n=3A202097
• T(n,k)=Number of (n+2)X(k+2) binary arrays avoiding patterns 001 and 011 in rows and columns.at n=31A202100
• T(n,k)=Number of (n+2)X(k+2) binary arrays avoiding patterns 001 and 011 in rows and columns.at n=32A202100
• Number of nX3 0..2 arrays with every element neighboring horizontally or vertically both a 0 and a 1.at n=7A203537
• T(n,k)=Number of nXk 0..2 arrays with every element neighboring horizontally or vertically both a 0 and a 1.at n=47A203542