4891490533

Appears in sequences

• a(n) = n*x^n + (n-1)*x^(n-1) + . . . + x + 1 for x=4.at n=14A088582
• Primes of the form n*x^n + (n-1)*x^(n-1) + . . . + x + 1 for x=4.at n=7A088583