122070312500
domain: N
Appears in sequences
- a(0) = 1; a(n) = 4*5^(n-1) for n >= 1.at n=16A005054
- a(n) = det(M(n)) where M(n) is the n X n matrix defined by m(i,i)=6, m(i,j)=i/j.at n=14A079027
- 5th binomial transform of (1,1,0,0,0,0,.....).at n=15A081105
- a(1)=5. For n > 1, a(n) = 4*5^(n-1) = A005054(n).at n=15A110595
- Number of palindromes of length n (in base 5).at n=30A117857
- a(n) = denominators of n!/10^n.at n=18A240534
- Hypotenuses for which there exist exactly 15 distinct integer triangles.at n=3A290503
- a(n) = phi(n^8) = n^7*phi(n).at n=24A306412