4780783

Appears in sequences

• Numbers of the form (3^s+1)/(3^r+1) for s > 1, 1 <= r <= s-1.at n=21A079672
• 9^n - 3^n + 1.at n=7A155614
• a(n) = A015518(A032742(n)) / A015518(A054576(n)).at n=41A280691
• a(n) = Sum_{d|n, d==1 mod 4} d^7 - Sum_{d|n, d==3 mod 4} d^7.at n=8A321823
• a(n) = Sum_{d|n, d==1 mod 4} d^7 - Sum_{d|n, d==3 mod 4} d^7.at n=17A321823
• a(n) = Sum_{d|n, n/d==1 mod 4} d^7 - Sum_{d|n, n/d==3 mod 4} d^7.at n=8A321831