261813

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=31A005253
• Number of nX3 0..1 arrays with every element unequal to 0, 1, 3, 4 or 6 king-move adjacent elements, with upper left element zero.at n=16A304539
• Number of compositions of 5*n-1 into parts 2 and 5.at n=12A369842
• Expansion of (1 + x)^2/(1 - x^2*(1 + x)^3).at n=20A375317
• a(n) = Sum_{k=0..floor(2*n/5)} binomial(2*n-3*k,2*k).at n=16A391541