4605822

Appears in sequences

• a(n) = Sum_{k=0..2n} (k+1) * A025177(n, k).at n=12A027261
• Expansion of x(3-x^2)/(1-3x).at n=14A114982
• Number of 4-ary Lyndon words of length n with exactly three 1s.at n=10A124811
• Number of permutations of 2 indistinguishable copies of 1..n arranged in a circle with exactly 1 local maximum.at n=11A159715