416019

Appears in sequences

• A transform of (1-x)/(1-2x).at n=27A099517
• Number of different possible rows (or columns) in an n X n crossword puzzle.at n=27A130578
• Positions of the records of the negative integers in A179319; a(n) is the first position in A179319 equal to -n.at n=9A183556
• Positions of records in A179319 for both positive and negative integers; A183555 and A183556 merged together.at n=18A183557
• a(n) = ((F(n-1)+F(n-2))-1)/2 if F(n) is odd, otherwise a(n) = ((F(n-1)+F(n-2))-2)/2, where F(n) = A000045(n) is the n-th Fibonacci number.at n=29A201864