611934

Appears in sequences

• a(n)=n+floor(r*a(n-1)), where r = golden ratio = (1+sqrt(5))/2, a(0)=0, a(1)=1.at n=25A182640
• Number of 0..n arrays x(0..4) of 5 elements without any interior element greater than both neighbors.at n=18A200888