87149

Properties

Appears in sequences

• Numerator of Sum_{i=1..n} 1/(i*C(2*i,i)).at n=8A112099
• Numerators of partial sums for a series for 2*Pi*sqrt(3)/9.at n=7A130553
• The number of palindromic primes leading and ending with 1, 3, 7 or 9 -- in sequence -- of length 2*ceiling(n/4)+1.at n=22A220248
• Number of length 4 1..(n+2) arrays with no leading partial sum equal to a prime.at n=21A254542
• Prime numbersat n=8463