984375

Appears in sequences

• Odd pentagonal pyramidal numbers.at n=31A015223
• 7-automorphic numbers ending in 5: final digits of 7n^2 agree with n.at n=5A030991
• Triangle whose (i,j)-th entry is binomial(i,j)*5^(i-j)*9^j.at n=29A038251
• n and n+9 are 9-almost primes.at n=5A124946
• String of digits encountered in decimal expansion of successive ratios k/(k+1), treating only non-repeating expansions, with decimal point and leading and trailing zeros removed.at n=11A156703
• a(n) = n^6*(n^3 + 1)/2.at n=5A168555
• Monotonic ordering of nonnegative differences 10^i-5^j, for 40>= i>=0, j>=0.at n=28A192202
• Triangle by rows T(n,k), showing the number of meanders with length (n+1)*6 and containing (k+1)*6 Ls and (n-k)*6 Rs, where Ls and Rs denote arcs of equal length and a central angle of 60 degrees which are positively or negatively oriented.at n=16A197655
• a(n) = 10^n - 5^n.at n=6A248340