885888

Appears in sequences

• a(n) contains n digits (either '5' or '8') and is divisible by 2^n.at n=5A053378
• Let P(A) be the power set of an n-element set A and let B be the Cartesian product of P(A) with itself. Remove (y,x) from B when (x,y) is in B and x <> y and let R35 denote the reduced set B. Then a(n) = the sum of the sizes of the union of x and y for every (x,y) in R35.at n=9A133224
• Numbers k such that k and k^2 use only the digits 4, 5, 7, 8 and 9.at n=6A137143