262500

Appears in sequences

• Triangle of coefficients in expansion of (2+5x)^n.at n=33A013621
• Triangle whose (i,j)-th entry is binomial(i,j)*5^(i-j)*2^j.at n=30A038244
• Number of nonisomorphic proper colorings of partition star graph using six colors.at n=55A297570
• Triangular array read by rows: row n shows the coefficients of the polynomial p(x,n) constructed as in Comments; these polynomials form a strong divisibility sequence.at n=26A327322
• Terms of A301517 that are not exponentially odd numbers (A268335).at n=23A335989