190734863281
domain: N
Appears in sequences
- a(n) = (5^n - 1)/4.at n=17A003463
- Cyclotomic polynomials at x=5.at n=17A019323
- Zsigmondy numbers for a = 5, b = 1: Zs(n, 5, 1) is the greatest divisor of 5^n - 1^n (A024049) that is relatively prime to 5^m - 1^m for all positive integers m < n.at n=16A064081
- a(n) = (Sum_{i=0..n} 5^i) + 1 - (Sum_{i=0..n} 5^i) mod 2.at n=16A102239
- a(n) = (5^n - 1)/(2^(3 - (n mod 2))).at n=17A152417
- a(n) = Sum_{d|n} Moebius(n/d)*d^(b-1)/phi(n) for b = 18.at n=4A161213
- a(n) = n*(n^8 + 1)*(n^4 + 1)*(n^2 + 1)*(n + 1) + 1.at n=5A269442