444544

Appears in sequences

• a(n) contains n digits (either '4' or '5') and is divisible by 2^n.at n=5A053315
• Number of (s(0), s(1), ..., s(2n)) such that 0 < s(i) < 8 and |s(i) - s(i-1)| = 1 for i = 1,2,...,2n, s(0) = 1, s(2n) = 3.at n=11A094803