194327

Appears in sequences

• Fermat coefficients.at n=33A000970
• Lucas-Carmichael numbers: squarefree composite numbers k such that p | k => p+1 | k+1.at n=34A006972
• Lucas-Carmichael numbers with 4 prime factors.at n=11A216926
• a(n) = binomial(5n+6, 4)/5 for n >= 0.at n=13A238471
• Number of length 2+2 0..n arrays with the medians of every three consecutive terms nondecreasing.at n=21A250141
• a(n) = Sum_{k=0..floor(n/3)} binomial(2*n-3*k-2,n-3*k).at n=11A371871