106843

Appears in sequences

• Triangle read by rows: T(n,k) = number of peakless Motzkin paths of length n containing k DHH...HU's, where U=(1,1), D=(1,-1) and H=(1,0) (can be easily expressed using RNA secondary structure terminology).at n=35A098083
• Expansion of (1+t^2+4*t^3+2*t^4+t^5+3*t^6)/((1-t)^2*(1-t^2)*(1-t^3)^2).at n=43A100779
• Smallest natural number m such that n^n^n - m is a prime.at n=4A103112
• Number of peakless Motzkin paths of length n containing no subwords of type dh^ju (j>=1), where u=(1,1), h=(1,0), and d=(1,-1) (can be easily expressed using RNA secondary structure terminology).at n=17A190162
• Expansion of e.g.f. exp( x/(1-x)^2 ) / (1-x)^2.at n=6A343884
• Square array T(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where T(n,k) = n! * Sum_{j=0..n} binomial(n+(k-1)*(j+1),n-j)/j!.at n=42A361616
• Smallest k such that 6^(6^n) - k is prime.at n=6A364454