113887

Appears in sequences

• Number of (s(0), s(1), ..., s(2n)) such that 0 < s(i) < 9 and |s(i) - s(i-1)| = 1 for i = 1,2,...,2n, s(0) = 3, s(2n) = 5.at n=9A094833
• Numbers k such that (7*10^(2*k+1) + 9*10^k - 7)/9 is prime.at n=10A183182
• Expansion of x*(1+x) / (1-3*x^2-x^3).at n=20A188022
• Number of numbers k in interval [(p_n)^2+1, (p_n)^4] for which lpf(k-1)>lpf(k-3)>=p_n, such that {k-3, k-1} is not a pair of twin primes, where p_n=prime(n) and lpf = A020639.at n=14A243804