84036domain: NAppears in sequencesa(n) = n*7^n + 1.at n=5A050919Numbers k such that k^6 == 1 (mod 7^5).at n=30A056103a(n) = 5*7^n+1.at n=5A199422Expansion of Sum_{k>=1} x^k * (1 + k * x^k)^k.at n=34A327249