15869140625
domain: N
Appears in sequences
- a(n) = n*5^n.at n=13A036291
- a(n) = (2*n+1)*5^(2*n+1).at n=6A072172
- Expansion of (1-5x+40x^2)/((1-5x)(1+5x)).at n=14A091105
- Denominators of Egyptian fraction for Pi/16 based on Machin's formula.at n=12A157332
- Numbers with prime factorization of the form p_1^p_2*p_2^p_3*...p_(n-1)^p_n*p_n where p_(n-1) < p(n) and n > 1.at n=23A294110