890625

Appears in sequences

• Automorphic numbers: m^2 ends with m.at n=11A003226
• Automorphic numbers ending in digit 5: a(n) = 5^(2^n) mod 10^n.at n=5A007185
• Hexamorphic numbers: k such that the k-th hexagonal number ends with k.at n=30A039594
• Numbers k such that decimal expansion of k^2 contains k as a substring and k does not end in 0.at n=14A046831
• Numbers k such that k^2 can be obtained from k by inserting a block of digits.at n=44A046838
• Numbers m such that m-th triangular number (A000217) ends in m.at n=7A067270
• Numbers k such that the decimal representation of k is contained as substring in that of the k-th triangular number.at n=28A119238
• Numbers n such that the decimal representation of n is contained as substring in that of the n-th pentagonal number.at n=24A179782
• Number of (w,x,y,z) with all terms in {0,...,n} and at least one of these conditions holds: w<R, x<R, y<R, z>R, where R=max{w,x,y,z}-min{w,x,y,z}.at n=30A212752
• Numbers n not divisible by 100 such that both concat(1,n) and concat(6,n) are squares.at n=1A264805
• a(n) = smallest k with concat(1,k) and concat(n,k) both square numbers.at n=28A265432
• Number of permutations of n elements divided by the number of quaternary heaps on n+1 elements.at n=34A273732
• Numbers k such that product of divisors of k ends with k and k is nonprime (A018252).at n=29A278473
• Numbers n such that the product of proper divisors of n ends with n and n is not a multiplicatively perfect number (A007422).at n=34A278474
• Numbers k such that the decimal representation of k ends that of the sum of the first k cubes.at n=31A301912