77577

Appears in sequences

• Numbers having four 7's in base 10.at n=19A043520
• a(n) = smallest palindrome > a(n-1) (for n > 0) such that the sum of its prime digits is equal to palindrome with index n, or -1 if none exists.at n=12A114996
• G.f. satisfies: A(x) = -1 + x + A(x)^3 + 1/A(x)^3.at n=5A228713
• a(n) = 7*(10^(2n+1)-1)/9 - 2*10^n.at n=2A332175
• Numbers k such that A124440(k) is a square.at n=12A341032