2825760
domain: N
Appears in sequences
- a(n) = sinh(2*arccosh(n))^2 = 4*n^2*(n^2 - 1).at n=29A173121
- Triangle read by rows: T(n,m)=A060187(1+n,1+m) *n! / (n-m)!at n=24A177429
- Order of Fibonacci group F(n,4) (or 0 if the group is infinite).at n=40A202626
- a(n) = 16*n*(n+1)*(2*n+1)^2.at n=14A322677
- Numbers k such that P(k)^2 | k and P(k+1)^3 | (k+1), where P(k) = A006530(k) is the largest prime dividing k.at n=12A354563
- Numbers k such that P(k)^2 | k and P(k+1)^4 | (k+1), where P(k) = A006530(k) is the largest prime dividing k.at n=5A354565
- Even positive numbers that are one less than the square of a perfect power.at n=24A389955