400285

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=32A005253
• Expansion of 1/(1-x^2*(1+x)^3).at n=22A116090
• Number of compositions of 5*n-4 into parts 2 and 5.at n=13A369844
• a(n) = Sum_{k=0..floor(3*n/5)} binomial(3*n-3*k,2*k).at n=11A375307