89821

Properties

Appears in sequences

• Primes that remain prime through 4 iterations of function f(x) = 9x + 10.at n=30A023327
• Primes p = 1 mod 6 such that all three iterations p=(6p+1) give primes = 1 mod 6.at n=19A210686
• Number of (7+1) X (n+1) 0..1 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction.at n=34A250661
• Number of nonempty pairwise coprime subsets of {1,...,n}, where a single number is not considered to be pairwise coprime unless it is equal to 1.at n=34A320426
• Number of words of length n over the alphabet {0,1,2} that contain the substring 12 but not the substring 01.at n=12A335551
• Prime numbersat n=8697