54118

Appears in sequences

• Numbers n such that if n = a U b (where U denotes concatenation) then abs(sigma*(a) - sigma*(b)) = abs(sigma*(n) - n), where sigma*(n) is the sum of the anti-divisors of n.at n=17A239687
• Number of close American football games: number of ways for the game to end after n points have been scored and never be separated by more than one score after each play.at n=20A300998