667620

Appears in sequences

• a(n) = Sum_{k=0..n} binomial(floor(n-2k/3), k).at n=26A137402
• Number of -5..5 arrays x(0..n+2) of n+3 elements with zero sum and nonzero second and third differences.at n=3A200201
• T(n,k)=Number of -k..k arrays x(0..n+2) of n+3 elements with zero sum and nonzero second and third differences.at n=31A200204
• Number of -n..n arrays x(0..6) of 7 elements with zero sum and nonzero second and third differences.at n=4A200208