18277014

Appears in sequences

• Number of binary words of length n in which the ones occur only in blocks of length at least 4.at n=41A005253
• Expansion of 1/(1-x^2*(1+x)^3).at n=28A116090
• Number of compositions of 5*n-1 into parts 2 and 5.at n=16A369842
• a(n) = Sum_{k=0..floor(3*n/5)} binomial(3*n-3*k,2*k).at n=14A375307
• a(n) = Sum_{k=0..floor(2*n/5)} binomial(2*n-3*k,2*k).at n=21A391541