1815191

Appears in sequences

• a(n) = Sum_{k=0..floor(n/7)} binomial(n-4*k,3*k).at n=36A370722
• Expansion of 1/(1 - x^3*(1 + x)^4).at n=27A375318
• a(n) = Sum_{k=0..floor(2*n/7)} binomial(2*n-4*k,3*k).at n=18A392403