215288

Appears in sequences

• Starting index of a string of 5 or more consecutive equal digits in decimal expansion of Pi.at n=25A049517
• Starting index of a string of exactly 5 consecutive equal digits in decimal expansion of Pi.at n=21A049521
• Starting positions of strings of four 0's in the decimal expansion of Pi.at n=24A083598
• a(n) = Sum_{k=0..n} binomial(n,k)*floor(sqrt(Bell(k)))*floor(sqrt(Bell(n-k))).at n=11A192574