50025

Appears in sequences

• Numbers k such that k and k^2 use only the digits 0, 2, 5 and 6.at n=24A136911
• Numbers k such that k and k^2 use only the digits 0, 2, 5, 6 and 8.at n=36A136913
• Numbers k such that k and k^2 use only the digits 0, 2, 5, 6 and 9.at n=33A136914
• a(n) = 74*n^2 + 1.at n=26A158742
• Irregular triangle read by rows: T(n,k) (n >= 1, 0 <= k <= n^2) = number of n X n (0,1) real matrices with k zeros and permanent zero.at n=43A260043
• Expansion of (1+2*x-x^3) / (1-x-5*x^2+x^3+2*x^4).at n=11A384641